1
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Schoeny H, Rampler E, Binh Chu D, Schoeberl A, Galvez L, Blaukopf M, Kosma P, Koellensperger G. Achieving Absolute Molar Lipid Concentrations: A Phospholipidomics Cross-Validation Study. Anal Chem 2022; 94:1618-1625. [PMID: 35025205 PMCID: PMC8792901 DOI: 10.1021/acs.analchem.1c03743] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 01/05/2022] [Indexed: 01/28/2023]
Abstract
Standardization is essential in lipidomics and part of a huge community effort. However, with the still ongoing lack of reference materials, benchmarking quantification is hampered. Here, we propose traceable lipid class quantification as an important layer for the validation of quantitative lipidomics workflows. 31P nuclear magnetic resonance (NMR) and inductively coupled plasma (ICP)-mass spectrometry (MS) can use certified species-unspecific standards to validate shotgun or liquid chromatography (LC)-MS-based lipidomics approaches. We further introduce a novel lipid class quantification strategy based on lipid class separation and mass spectrometry using an all ion fragmentation (AIF) approach. Class-specific fragments, measured over a mass range typical for the lipid classes, are integrated to assess the lipid class concentration. The concept proved particularly interesting as low absolute limits of detection in the fmol range were achieved and LC-MS platforms are widely used in the field of lipidomics, while the accessibility of NMR and ICP-MS is limited. Using completely independent calibration strategies, the introduced validation scheme comprised the quantitative assessment of the complete phospholipid sub-ome, next to the individual lipid classes. Komagataella phaffii served as a prime example, showcasing mass balances and supporting the value of benchmarks for quantification at the lipid species level.
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Affiliation(s)
- Harald Schoeny
- Department
of Analytical Chemistry, Faculty of Chemistry, University of Vienna, Waehringer Str. 38, 1090 Vienna, Austria
| | - Evelyn Rampler
- Department
of Analytical Chemistry, Faculty of Chemistry, University of Vienna, Waehringer Str. 38, 1090 Vienna, Austria
- Vienna
Metabolomics Center (VIME), University of
Vienna, Althanstraße
14, 1090 Vienna, Austria
- Chemistry
Meets Microbiology, Althanstraße
14, 1090 Vienna, Austria
| | - Dinh Binh Chu
- Department
of Analytical Chemistry, Faculty of Chemistry, University of Vienna, Waehringer Str. 38, 1090 Vienna, Austria
- School
of Chemical Engineering, Hanoi University
of Science and Technology, 1 Dai Co Viet, Hai Ba Trung, Hanoi 100000, Vietnam
| | - Anna Schoeberl
- Department
of Analytical Chemistry, Faculty of Chemistry, University of Vienna, Waehringer Str. 38, 1090 Vienna, Austria
| | - Luis Galvez
- Department
of Analytical Chemistry, Faculty of Chemistry, University of Vienna, Waehringer Str. 38, 1090 Vienna, Austria
| | - Markus Blaukopf
- Department
of Chemistry, University of Natural Resources
and Life Sciences Vienna, 1190 Vienna, Austria
| | - Paul Kosma
- Department
of Chemistry, University of Natural Resources
and Life Sciences Vienna, 1190 Vienna, Austria
| | - Gunda Koellensperger
- Department
of Analytical Chemistry, Faculty of Chemistry, University of Vienna, Waehringer Str. 38, 1090 Vienna, Austria
- Vienna
Metabolomics Center (VIME), University of
Vienna, Althanstraße
14, 1090 Vienna, Austria
- Chemistry
Meets Microbiology, Althanstraße
14, 1090 Vienna, Austria
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2
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Vu CT, Le PT, Chu DB, Bui VH, Phung TLA, Nguyen Le HY, Labanowski J, Mondamert L, Herrmann M, Behra P. One-step purification/extraction method to access glyphosate, glufosinate, and their metabolites in natural waters. J Chromatogr A 2021; 1649:462188. [PMID: 34034108 DOI: 10.1016/j.chroma.2021.462188] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 04/15/2021] [Accepted: 04/18/2021] [Indexed: 10/21/2022]
Abstract
A new green method for trace level quantification of four herbicides, glyphosate (GLYP), glufosinate (GLUF), and their main metabolites, aminomethylphosphonic acid (AMPA) and 3-(methyl-phosphinico)-propionic acid (MPPA), was developed. The purification step without any derivatization was conducted by solid-phase extraction using Chelex-100 resin in the Fe (III) form, followed by elution with 5% NH4OH. The four analytes were quantified by ultra-high-performance liquid chromatography coupled to tandem mass spectrometry. The developed extraction method was validated on five fresh and sea water matrices with mean recoveries ranging from 80.1% to 109.4% (relative standard deviation < 20%). The extraction conditions were evaluated and certified for the high applicability of the extraction method too. The limits of detection (ng/L) in the five water matrices were in ranges 0.70 - 4.0, 2.4 - 3.9, 1.8 - 4.7, and 1.6 - 4.0 for GLYP, AMPA, GLUF, and MPPA, respectively. The method was successfully applied to detect the four compounds in surface waters sampled along the Red River Delta region in July 2019. The highest concentrations were detected at 565, 1,330, 234, and 871 ng/L for GLYP, AMPA, GLUF, and MPPA, respectively. These results showed the potential capacity of this new method for convenient monitoring of herbicides and their metabolites in the diverse natural water system.
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Affiliation(s)
- Cam Tu Vu
- Water - Environment - Oceanography Department, University of Science and Technology of Hanoi, Vietnam Academy of Science and Technology, 100000 Hanoi, Vietnam.
| | - Phuong Thu Le
- Water - Environment - Oceanography Department, University of Science and Technology of Hanoi, Vietnam Academy of Science and Technology, 100000 Hanoi, Vietnam
| | - Dinh Binh Chu
- Department of Analytical Chemistry, Hanoi University of Science and Technology (HUST), 100000 Hanoi, Vietnam
| | - Van Hoi Bui
- Water - Environment - Oceanography Department, University of Science and Technology of Hanoi, Vietnam Academy of Science and Technology, 100000 Hanoi, Vietnam
| | - Thi Lan Anh Phung
- School of Environmental Research and Technology, HUST, 100000 Hanoi, Vietnam
| | - Hoang Yen Nguyen Le
- Water - Environment - Oceanography Department, University of Science and Technology of Hanoi, Vietnam Academy of Science and Technology, 100000 Hanoi, Vietnam
| | - Jérôme Labanowski
- Université de Poitiers, Dept Water & Geochem, ENSIP, IC2MP, 86073 Poitiers Cedex 9, France
| | - Leslie Mondamert
- Université de Poitiers, Dept Water & Geochem, ENSIP, IC2MP, 86073 Poitiers Cedex 9, France
| | - Marine Herrmann
- Water - Environment - Oceanography Department, University of Science and Technology of Hanoi, Vietnam Academy of Science and Technology, 100000 Hanoi, Vietnam; LEGOS, IRD/CNRS/CNES/Université Toulouse 3, 31400 Toulouse, France
| | - Philippe Behra
- Laboratoire de Chimie Agro-Industrielle, LCA, Université de Toulouse, INRAE, 31030 Toulouse Cedex 4, France; Water - Environment - Oceanography Department, University of Science and Technology of Hanoi, Vietnam Academy of Science and Technology, 100000 Hanoi, Vietnam.
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3
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Vu-Duc N, Phung Thi LA, Le-Minh T, Nguyen LA, Nguyen-Thi H, Pham-Thi LH, Doan-Thi VA, Le-Quang H, Nguyen-Xuan H, Thi Nguyen T, Nguyen PT, Chu DB. Analysis of Polycyclic Aromatic Hydrocarbon in Airborne Particulate Matter Samples by Gas Chromatography in Combination with Tandem Mass Spectrometry (GC-MS/MS). J Anal Methods Chem 2021; 2021:6641326. [PMID: 34136305 PMCID: PMC8175174 DOI: 10.1155/2021/6641326] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 04/17/2021] [Accepted: 05/12/2021] [Indexed: 05/26/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs), the family of organic contaminations, have been shown to have negative effects on human health. However, until now, the comprehension on occurrence, distribution, and risk assessment of human exposure to PAHs has been limited in Vietnam. In this work, a capillary gas chromatography coupled with electron impact ionization tandem mass spectrometry (GC-EI-MS/MS) has been introduced for analysis of 16 PAHs in some particulate matter samples. PAHs have been separated on the TG 5 ms capillary gas chromatographic column and detected by tandem mass spectrometry in multiple reaction monitoring mode. The PAHs in the particulate matter (PM 2.5 and PM 10) samples were extracted by ultrasonic-assisted liquid extraction and cleaned up by an acidic silica gel solid phase extraction. The linearity range of all analyzed PAHs was from 5 to 2000 ng mL-1 with R 2 ≥0.9990. Limit of detection (LOD) of PAHs in particulate matter sample was from 0.001 ng m-3 (Br-Naph) to 0.276 ng m-3 (Fln). The recovery of PAHs was investigated by international proficiency testing samples. The recoveries of PAHs in proficiency testing sample ranged from 79.3% (Chr) to 109.8% (IcdP). The in-house validated GC-EI-MS/MS method was then applied to analysis of some particulate matter samples that were collected in the Hanoi areas. The total concentrations of PAHs in several brands of samples collected from Hanoi were found in the range of 226.3 ng m-3-706.43 ng m-3. Among the studied compounds, naphthalene was found at high frequency and ranged from 106.5 ng m-3 to 631.1 ng m-3. The main distribution of the PAHs in particulate matter samples was two-ring and three-ring compounds.
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Affiliation(s)
- Nam Vu-Duc
- Center for Research and Technology Transfer, Vietnam Academic of Science and Technology, 18 Hoang Quoc Viet, Hanoi 100000, Vietnam
| | - Lan Anh Phung Thi
- School of Environmental Science and Technology, Hanoi University of Science and Technology, No. 1 Dai Co Viet, Hanoi 100000, Vietnam
| | - Thuy Le-Minh
- Center for Research and Technology Transfer, Vietnam Academic of Science and Technology, 18 Hoang Quoc Viet, Hanoi 100000, Vietnam
| | - Lan-Anh Nguyen
- Center for Research and Technology Transfer, Vietnam Academic of Science and Technology, 18 Hoang Quoc Viet, Hanoi 100000, Vietnam
| | - Huong Nguyen-Thi
- Center for Research and Technology Transfer, Vietnam Academic of Science and Technology, 18 Hoang Quoc Viet, Hanoi 100000, Vietnam
| | - Loan-Ha Pham-Thi
- Center for Research and Technology Transfer, Vietnam Academic of Science and Technology, 18 Hoang Quoc Viet, Hanoi 100000, Vietnam
| | - Van-Anh Doan-Thi
- Center for Research and Technology Transfer, Vietnam Academic of Science and Technology, 18 Hoang Quoc Viet, Hanoi 100000, Vietnam
| | - Huong Le-Quang
- Center for Research and Technology Transfer, Vietnam Academic of Science and Technology, 18 Hoang Quoc Viet, Hanoi 100000, Vietnam
| | - Hung Nguyen-Xuan
- Center for Research and Technology Transfer, Vietnam Academic of Science and Technology, 18 Hoang Quoc Viet, Hanoi 100000, Vietnam
| | - Thao Thi Nguyen
- School of Environmental Science and Technology, Hanoi University of Science and Technology, No. 1 Dai Co Viet, Hanoi 100000, Vietnam
| | - Phuong Thanh Nguyen
- FPT University, Hoa Lac High Tech Park, Km 29 Thang Long Boulevard, Thach That, Hanoi 100000, Vietnam
| | - Dinh Binh Chu
- Department of Analytical Chemistry, School of Chemical Engineering, Hanoi University of Science and Technology, No. 1 Dai Co Viet Road, Hanoi 100000, Vietnam
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Van Hoi B, Vu CT, Phung-Thi LA, Thi Nguyen T, Nguyen PT, Mai H, Le PT, Nguyen TH, Thanh Duong D, Nguyen Thi H, Le-Van D, Chu DB. Determination of Pharmaceutical Residues by UPLC-MS/MS Method: Validation and Application on Surface Water and Hospital Wastewater. J Anal Methods Chem 2021; 2021:6628285. [PMID: 33505763 PMCID: PMC7811430 DOI: 10.1155/2021/6628285] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 11/24/2020] [Accepted: 12/16/2020] [Indexed: 06/12/2023]
Abstract
In this study, an analytical method for the simultaneous determination of 7 major pharmaceutical residues in Vietnam, namely, carbamazepine, ciprofloxacin, ofloxacin, ketoprofen, paracetamol, sulfamethoxazole, and trimethoprim, in surface water and hospital wastewater has been developed. The method includes enrichment and clean-up steps by solid phase extraction using mix-mode cation exchange, followed by identification and quantification using an ultrahigh-performance liquid chromatography and tandem mass spectrometry and employing electrospray ionization (UPLC-ESI-MS/MS). Seven target compounds were separated on the reversed phase column and detected in multiple reaction monitoring (MRM) mode within 6 minutes. The present study also optimized the operating parameters of the mass spectrometer to achieve the highest analytical signals for all target compounds. All characteristic parameters of the analytical method were investigated, including linearity range, limit of detection, limit of quantification, precision, and accuracy. The important parameter in UPLC-ESI-MS/MS, matrix effect, was assessed and implemented via preextraction and postextraction spiking experiments. The overall recoveries of all target compounds were in the ranges from 55% to 109% and 56 % to 115% for surface water and hospital wastewater, respectively. Detection limits for surface water and hospital wastewater were 0.005-0.015 µg L-1 and 0.014-0.123 µg L-1, respectively. The sensitivity of the developed method was allowed for determination of target compounds at trace level in environmental water samples. The in-house validation of the developed method was performed by spiking experiment in both the surface water and hospital wastewater matrix. The method was then applied to analyze several surface water and hospital wastewater samples taken from West Lake and some hospitals in Vietnam, where the level of these pharmaceutical product residues was still missed. Sulfamethoxazole was present at a high detection frequency in both surface water (33% of analyzed samples) and hospital wastewater (81% of analyzed samples) samples.
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Affiliation(s)
- Bui Van Hoi
- Department of Water–Environment-Oceanography, University of Science and Technology of Hanoi (USTH), Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Cam-Tu Vu
- Department of Water–Environment-Oceanography, University of Science and Technology of Hanoi (USTH), Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Lan-Anh Phung-Thi
- School of Environmental Science and Technology, Hanoi University of Science and Technology, No. 1 Dai Co Viet, Hanoi 100000, Vietnam
| | - Thao Thi Nguyen
- School of Environmental Science and Technology, Hanoi University of Science and Technology, No. 1 Dai Co Viet, Hanoi 100000, Vietnam
| | - Phuong Thanh Nguyen
- FPT University, Hoa Lac High Tech Park, Km 29 Thang Long Boulevard, Thach That, Hanoi 100000, Vietnam
| | - Huong Mai
- Department of Water–Environment-Oceanography, University of Science and Technology of Hanoi (USTH), Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Phuong-Thu Le
- Department of Water–Environment-Oceanography, University of Science and Technology of Hanoi (USTH), Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Thanh-Hien Nguyen
- Department of Water–Environment-Oceanography, University of Science and Technology of Hanoi (USTH), Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Dao Thanh Duong
- Department of Water–Environment-Oceanography, University of Science and Technology of Hanoi (USTH), Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Hue Nguyen Thi
- Institute of Environmental Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Dung Le-Van
- Department of Chemistry, Vietnam Military Medical University, 160 Phung Hung, Ha Dong, Hanoi 100000, Vietnam
| | - Dinh Binh Chu
- School of Chemical Engineering, Hanoi University of Science and Technology, No. 1 Dai Co Viet, Hanoi 100000, Vietnam
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5
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Chu DB, Duong HT, Nguyet Luu MT, Vu-Thi HA, Ly BT, Loi VD. Arsenic and Heavy Metals in Vietnamese Rice: Assessment of Human Exposure to These Elements through Rice Consumption. J Anal Methods Chem 2021; 2021:6661955. [PMID: 33552612 PMCID: PMC7846392 DOI: 10.1155/2021/6661955] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 12/18/2020] [Accepted: 12/21/2020] [Indexed: 05/16/2023]
Abstract
In this work, twelve heavy metals and arsenic, As, Cd, Co, Cr, Cu, Fe, Hg, Mn, Ni, Pb, Se, and Zn, in a rice sample collected from some areas of Vietnam have been quantified and implemented by using multiple analytical platforms such as ICP-MS, AAS, and mercury analyser. Seventy rice samples collected from the Red River Delta and mining zone activity were analysed. Concentration of heavy metals and arsenic in rice was analysed after appropriated sample digestion using internal or external calibration curves. The mean concentration (mg kg-1 dried weight) of the analysed elements in rice samples decreased on the order of Mn (19.268) > Fe (13.624) > Zn (8.163) > Cu (3.138) > Ni (0.384) > Cr (0.296) > Co (0.279) > As (0.115) > Cd (0.111) > Pb (0.075) > Hg (0.007) > Se (<LOD). Mercury, a highly toxic element, has been only found in rice samples collected in the mining activity zone (frequency detection 14.5% of total samples). The experimental results indicated that the heavy metals and arsenic found in rice collected from mining activity zone were higher than those in rice harvested from normal cultivated areas like the Red River Delta. The heavy metals and arsenic content in Vietnamese rice samples were also compared with the concentration of heavy metals in other foreign rice samples in some recent publications. The estimated daily intake through rice consumption was calculated and compared with the level proposed by the Food and Agriculture Organization of the United Nations. The results indicated that the provisional daily intake of Cd was higher than the level proposed by FAO, while the intake of other heavy metals was in an acceptable range of CODEX standard.
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Affiliation(s)
- Dinh Binh Chu
- Department of Analytical Chemistry, School of Chemical Engineering, Hanoi University of Science and Technology, 1 Dai Co Viet Hai Ba Trung, Hanoi 100000, Vietnam
| | - Hung Tuan Duong
- Institute of Chemistry, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet Cau Giay, Hanoi 100000, Vietnam
| | - Minh Thi Nguyet Luu
- Institute of Chemistry, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet Cau Giay, Hanoi 100000, Vietnam
| | - Hong-An Vu-Thi
- Department of Analytical Chemistry, School of Chemical Engineering, Hanoi University of Science and Technology, 1 Dai Co Viet Hai Ba Trung, Hanoi 100000, Vietnam
| | - Bich-Thuy Ly
- School of Environmental Science and Technology, Hanoi University of Science and Technology, 1 Dai Co Viet Hai Ba Trung, Hanoi 100000, Vietnam
| | - Vu Duc Loi
- Institute of Chemistry, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet Cau Giay, Hanoi 100000, Vietnam
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Vu-Duc N, Nguyen-Quang T, Le-Minh T, Nguyen-Thi X, Tran TM, Vu HA, Nguyen LA, Doan-Duy T, Van Hoi B, Vu CT, Le-Van D, Phung-Thi LA, Vu-Thi HA, Chu DB. Multiresidue Pesticides Analysis of Vegetables in Vietnam by Ultrahigh-Performance Liquid Chromatography in Combination with High-Resolution Mass Spectrometry (UPLC-Orbitrap MS). J Anal Methods Chem 2019; 2019:3489634. [PMID: 31205797 PMCID: PMC6530207 DOI: 10.1155/2019/3489634] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 03/27/2019] [Accepted: 04/11/2019] [Indexed: 06/09/2023]
Abstract
An ultrahigh-performance liquid chromatography in combination with high-resolution mass spectrometry Thermo Q-Extractive Focus Orbitrap MS has been introduced for analysis of multiclass pesticides in vegetable samples collected in Hanoi, Vietnam. Multiclass pesticides were separated on the Thermo Hypersil Gold PFP column utilizing a gradient of the mobile phase consisting of 5 mM ammonium formate, 0.1% formic acid in deionized water, and methanol. The target analytes were detected in the full-scan mode on Thermo Scientific Q-Exactive Focus Orbitrap MS for quantitation at the optimum operating conditions. These conditions included, but not limit to, the resolution of 70000 at the full width at half maximum in both positive and negative mode, mass range from 80 to 1000 m/z, and optimized parameters for the heated electrospray ionization source. The identification of the analytes in real samples was based on retention times, mass to charge ratios, mass accuracies, and MS/MS spectra at the confirmation mode with the inclusion list of target analytes. The mass accuracies of target analytes were from -4.14 ppm (dinotefuran) to 1.42 ppm (cinosulfuron) in the neat solvent and from -3.91 ppm (spinosad D) to 1.29 ppm (cinosulfuron) in the matrix-matched solution. Target analytes in the vegetable-based matrix were extracted by the QuEChERS method. Some critical parameters of the analytical method such as linearity, repeatability, limit of detection, and limit of quantitation have been evaluated and implemented. Excellent LOD and LOQ of the developed method were achieved at the range of 0.04-0.85 and 0.13-2.9 μg·kg-1, respectively. Intraday and interday repeatability of the analytical signal (peak area, n=6) of the developed method were below 3% and 10%, correspondingly. The matrix effect, extraction recovery, and overall recovery were fully investigated by spiking experiments. Experimental results demonstrated that the ionization suppression or enhancement was the main contribution on the overall recoveries of target analytes. Finally, the in-house validated method was applied to pesticides screening in vegetables samples in local villages in Hanoi, Vietnam. The concentrations of all target analytes were below limit of quantitation and lower than US-FDA or EU maximum residue levels.
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Affiliation(s)
- Nam Vu-Duc
- Center for Research and Technology Transfer, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Hanoi 100000, Vietnam
| | - Trung Nguyen-Quang
- Center for Research and Technology Transfer, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Hanoi 100000, Vietnam
| | - Thuy Le-Minh
- Center for Research and Technology Transfer, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Hanoi 100000, Vietnam
- Faculty of Chemistry, VNU University of Science, Vietnam National University-Hanoi, 19 Le Thanh Tong, Hanoi 100000, Vietnam
| | - Xuyen Nguyen-Thi
- Center for Research and Technology Transfer, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Hanoi 100000, Vietnam
- Faculty of Chemistry, VNU University of Science, Vietnam National University-Hanoi, 19 Le Thanh Tong, Hanoi 100000, Vietnam
| | - Tri Manh Tran
- Faculty of Chemistry, VNU University of Science, Vietnam National University-Hanoi, 19 Le Thanh Tong, Hanoi 100000, Vietnam
| | - Hai Anh Vu
- Faculty of Chemistry, VNU University of Science, Vietnam National University-Hanoi, 19 Le Thanh Tong, Hanoi 100000, Vietnam
| | - Lan-Anh Nguyen
- Faculty of Chemistry, VNU University of Science, Vietnam National University-Hanoi, 19 Le Thanh Tong, Hanoi 100000, Vietnam
| | - Tien Doan-Duy
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi 100000, Vietnam
| | - Bui Van Hoi
- Department of Water-Environment-Oceanography, University of Science and Technology of Hanoi (USTH), Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Hanoi 100000, Vietnam
| | - Cam-Tu Vu
- Department of Water-Environment-Oceanography, University of Science and Technology of Hanoi (USTH), Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Hanoi 100000, Vietnam
| | - Dung Le-Van
- Department of Chemistry, Vietnam Military Medical University, 160 Phung Hung, Hadong, Hanoi 100000, Vietnam
| | - Lan-Anh Phung-Thi
- School of Environmental Science and Technology, Hanoi University of Science and Technology, 1 Dai Co Viet, Hanoi 100000, Vietnam
| | - Hong-An Vu-Thi
- Department of Analytical Chemistry, School of Chemical Engineering, Hanoi University of Science and Technology, 1 Dai Co Viet, Hanoi 100000, Vietnam
| | - Dinh Binh Chu
- Department of Analytical Chemistry, School of Chemical Engineering, Hanoi University of Science and Technology, 1 Dai Co Viet, Hanoi 100000, Vietnam
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Vu HA, Nguyen MH, Vu-Thi HA, Do-Hong Q, Dang XH, Nguyen TNB, Trinh HQ, Ly Bich T, Nguyen TT, Le-Van D, Tu MB, Chu DB. Speciation Analysis of Arsenic Compounds by High-Performance Liquid Chromatography in Combination with Inductively Coupled Plasma Dynamic Reaction Cell Quadrupole Mass Spectrometry: Application for Vietnamese Rice Samples. J Anal Methods Chem 2019; 2019:5924942. [PMID: 31183246 PMCID: PMC6512032 DOI: 10.1155/2019/5924942] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 04/08/2019] [Accepted: 04/16/2019] [Indexed: 05/12/2023]
Abstract
In this work, high-performance liquid chromatography in combination with inductively coupled plasma dynamic reaction cell quadrupole mass spectrometry was introduced and optimized for speciation analysis of five major arsenic species including arsenobetain (AsB), arsenite (As(III)), monomethylarsonic (MMA), dimethylarsenonic acid (DMA), and arsenate (As(V)) in rice samples. Five arsenic compounds were separated on a Hamilton PRP X100 strong anion-exchange column employed with the mobile phase that is compatible with mass spectrometry, containing ammonium carbonate, methanol, and disodium ethylenediaminetetraacetic acid. Arsenic compounds were detected online by inductively coupled plasma dynamic reaction cell quadrupole mass spectrometry utilizing oxygen as the reaction gas at a flow rate of 0.7 mL·min-1. Five selected arsenic species were baseline separated at the optimum experimental conditions. The excellent LOD and LOQ values of the developed method were achieved in the range of 0.5 to 2.9 μg·kg-1 and 1.7 to 9.6 μg·kg-1 for all species of arsenic, respectively. The ionization effect in plasma during chromatographic gradient elution was systematically investigated by using postcolumn injector. Arsenic compounds in rice samples were extracted by diluted nitric acid at elevated temperature. The extraction efficiency and the interconversion of target compounds during sample preparation were also assessed. The full validation of the developed method was performed by using certified reference material, BRC 211, from European Institute of Reference and Standard for speciation analysis. The recovery of all selected arsenic species was in the range of 70 to 135.5%. The validated method was also applied to analyze rice samples collected from some contaminated rice fields. The results showed that As(III), DMA, and As(V) were found in all rice samples. Average concentration (range) of inorganic arsenic and DMA in all rice samples were 130.3 (65.5-228.1) and 32 (8.2-133.01) μg·kg-1, respectively. However, total concentration of inorganic arsenic in most of investigated rice samples was below the maximum residual level according to US-FDA and European Union standards.
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Affiliation(s)
- Hai Anh Vu
- Faculty of Chemistry, VNU University of Science, Vietnam National University Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi 100000, Vietnam
| | - Manh Ha Nguyen
- Faculty of Chemistry, VNU University of Science, Vietnam National University Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi 100000, Vietnam
| | - Hong-An Vu-Thi
- Department of Analytical Chemistry, School of Chemical Engineering, Hanoi University of Science and Technology, 1 Dai Co Viet, Hai Ba Trung, Hanoi 100000, Vietnam
| | - Quan Do-Hong
- Department of Analytical Chemistry, School of Chemical Engineering, Hanoi University of Science and Technology, 1 Dai Co Viet, Hai Ba Trung, Hanoi 100000, Vietnam
| | - Xuan Hoang Dang
- Institute of Chemistry, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Thi Ngoc Bich Nguyen
- Institute of Chemistry, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Hong Quan Trinh
- Institute of Chemistry, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Thuy Ly Bich
- School of Environmental Science and Technology, Hanoi University of Science and Technology, 1 Dai Co Viet, Hai Ba Trung, Hanoi 100000, Vietnam
| | - Tien-Thanh Nguyen
- School of Biotechnology and Food Technology, Hanoi University of Science and Technology, 1 Dai Co Viet, Hai Ba Trung, Hanoi 100000, Vietnam
| | - Dung Le-Van
- Department of Chemistry, Vietnam Military Medical University, 160 Phung Hung, Ha Dong, Hanoi 100000, Vietnam
| | - Minh Binh Tu
- Faculty of Chemistry, VNU University of Science, Vietnam National University Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi 100000, Vietnam
| | - Dinh Binh Chu
- Department of Analytical Chemistry, School of Chemical Engineering, Hanoi University of Science and Technology, 1 Dai Co Viet, Hai Ba Trung, Hanoi 100000, Vietnam
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Kahn LG, Han X, Koshy TT, Shao Y, Chu DB, Kannan K, Trasande L. Adolescents exposed to the World Trade Center collapse have elevated serum dioxin and furan concentrations more than 12years later. Environ Int 2018; 111:268-278. [PMID: 29246432 PMCID: PMC5800899 DOI: 10.1016/j.envint.2017.11.026] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 11/06/2017] [Accepted: 11/28/2017] [Indexed: 05/30/2023]
Abstract
BACKGROUND The collapse of the World Trade Center (WTC) on September 11, 2001 released a dust cloud containing numerous environmental contaminants, including polychlorinated dibenzo-para-dioxins and polychlorinated dibenzofurans (PCDD/Fs). PCDD/Fs are toxic and are associated with numerous adverse health outcomes including cancer, diabetes, and impaired reproductive and immunologic function. Prior studies have found adults exposed to the WTC disaster to have elevated levels of PCDD/Fs. This is the first study to assess PCDD/F levels in WTC-exposed children. METHODS This analysis includes 110 participants, a subset of the 2014-2016 WTC Adolescent Health Study, a group of both exposed youths who lived, attended school, or were present in lower Manhattan on 9/11 recruited from the WTC Health Registry (WTCHR) and unexposed youths frequency matched on age, sex, race, ethnicity, and income. Our sample was selected to maximize the contrast in their exposure to dust from the WTC collapse. Questionnaire data, including items about chronic home dust and acute dust cloud exposure, anthropometric measures, and biologic specimens were collected during a clinic visit. Serum PCDD/F concentrations were measured according to a standardized procedure at the New York State Department of Health Organic Analytical Laboratory. We used multivariable linear regression to assess differences in PCCD/Fs between WTCHR and non-WTCHR participants. We also compared mean and median PCDD/F and toxic equivalency (TEQ) concentrations in our cohort to 2003-4 National Health and Nutrition Examination Survey (NHANES) levels for youths age 12-19. RESULTS Median PCDD/F levels were statistically significantly higher among WTCHR participants compared to non-WTCHR participants for 16 out of 17 congeners. Mean and median TEQ concentrations in WTCHR participants were >7 times those in non-WTCHR participants (72.5 vs. 10.1 and 25. 3 vs. 3.39pg/g lipid, respectively). Among WTCHR participants, median concentrations of several PCDD/Fs were higher than the NHANES 95th percentiles. After controlling for dust cloud exposure, home dust exposure was significantly associated with higher PCDD/F level. CONCLUSIONS Adolescents in lower Manhattan on the day of the WTC attack and exposed to particulate contamination from the WTC collapse had significantly elevated PCDD/F levels >12years later compared to a matched comparison group, driven by chronic home dust exposure rather than acute dust cloud exposure. PCDD/F and TEQ levels substantially exceeded those in similar-aged NHANES participants. Future studies are warranted to explore associations of PCDD/Fs with health and developmental outcomes among individuals exposed to the WTC disaster as children.
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Affiliation(s)
- Linda G Kahn
- Department of Pediatrics, New York University School of Medicine, 403 East 34th Street, New York, NY 10016, USA.
| | - Xiaoxia Han
- Department of Population Health, New York University School of Medicine, 650 1st Avenue, New York, NY 10016, USA.
| | - Tony T Koshy
- Department of Pediatrics, New York University School of Medicine, 403 East 34th Street, New York, NY 10016, USA.
| | - Yongzhao Shao
- Department of Population Health, New York University School of Medicine, 650 1st Avenue, New York, NY 10016, USA; Department of Environmental Medicine, New York University School of Medicine, 650 1st Avenue, New York, NY 10016, USA.
| | - Dinh Binh Chu
- Wadsworth Center, New York State Department of Health, Empire State Plaza, Albany, NY 12201, USA.
| | - Kurunthachalam Kannan
- Wadsworth Center, New York State Department of Health, Empire State Plaza, Albany, NY 12201, USA; Department of Environmental Health Sciences, University at Albany, State University of New York, Albany, NY 12201-0509, USA.
| | - Leonardo Trasande
- Department of Pediatrics, New York University School of Medicine, 403 East 34th Street, New York, NY 10016, USA; Department of Population Health, New York University School of Medicine, 650 1st Avenue, New York, NY 10016, USA; Department of Environmental Medicine, New York University School of Medicine, 650 1st Avenue, New York, NY 10016, USA; Department of Medicine, New York University School of Medicine, 550 1st Avenue, New York, NY 10016, USA; NYU Wagner School of Public Service, 295 Lafayette Street, New York, NY 10012, USA; NYU College of Global Public Health, 726 Broadway, New York, NY 10012, USA.
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Nguyen MH, Pham TD, Nguyen TL, Vu HA, Ta TT, Tu MB, Nguyen THY, Chu DB. Speciation Analysis of Arsenic Compounds by HPLC-ICP-MS: Application for Human Serum and Urine. J Anal Methods Chem 2018; 2018:9462019. [PMID: 30538885 PMCID: PMC6258103 DOI: 10.1155/2018/9462019] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 10/25/2018] [Indexed: 05/06/2023]
Abstract
A high-performance liquid chromatography (HPLC) in combination with inductively coupled plasma mass spectrometry (ICP-MS) as an elemental specific detector was used for the speciation analysis of arsenic compounds in urine and serum samples from Vietnam. Five arsenic species including arsenite (AsIII), arsenate (AsV), monomethylarsonic acid (MMA), dimethylarsinic acid (DMA), and arsenobetaine (AsB) were studied. A gradient elution of ammonium carbonate ((NH4)2CO3), ethylenediaminetetraacetic acid disodium salt (Na2EDTA), and methanol at pH 9.0 utilizing Hamilton PRP-X100 strong anion-exchange column allowed the chromatographic separation of five arsenic species. In this study, urine and serum samples were prepared by dilution in solvent and protein precipitation by trichloroacetic acid, respectively. The extraction efficiency was greater than 91% for urine matrix, and recoveries from spiked samples were in the range of 94-139% for the arsenic species in human serum. The method limit of detection (MDL) and limit of quantification (MQL), which were calculated by signal to noise ratio, were found to be 0.3-1.5 and 1.0-5.0 ng·mL-1, respectively. The concentration of arsenic species in 17 pairs of urine and serum samples from Vietnam was also quantified and evaluated. The major species of arsenic in the urine and serum samples were AsB and DMA.
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Affiliation(s)
- Manh Ha Nguyen
- Faculty of Chemistry, VNU University of Science, Vietnam National University-Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi 100000, Vietnam
| | - Tien Duc Pham
- Faculty of Chemistry, VNU University of Science, Vietnam National University-Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi 100000, Vietnam
| | - Thi Lien Nguyen
- Faculty of Chemistry, VNU University of Science, Vietnam National University-Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi 100000, Vietnam
| | - Hai Anh Vu
- Faculty of Chemistry, VNU University of Science, Vietnam National University-Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi 100000, Vietnam
| | - Thi Thao Ta
- Faculty of Chemistry, VNU University of Science, Vietnam National University-Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi 100000, Vietnam
| | - Minh Binh Tu
- Faculty of Chemistry, VNU University of Science, Vietnam National University-Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi 100000, Vietnam
| | - Thi Hong Yen Nguyen
- National Institute of Hygiene and Epidemiology, 1 Yersin, Hai Ba Trung, Hanoi 100000, Vietnam
| | - Dinh Binh Chu
- School of Chemical Engineering, Hanoi University of Science and Technology, 1 Dai Co Viet, Hai Ba Trung, Hanoi 100000, Vietnam
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Koshy TT, Attina TM, Ghassabian A, Gilbert J, Burdine LK, Marmor M, Honda M, Chu DB, Han X, Shao Y, Kannan K, Urbina EM, Trasande L. Serum perfluoroalkyl substances and cardiometabolic consequences in adolescents exposed to the World Trade Center disaster and a matched comparison group. Environ Int 2017; 109:128-135. [PMID: 28890218 PMCID: PMC5660646 DOI: 10.1016/j.envint.2017.08.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 08/03/2017] [Accepted: 08/04/2017] [Indexed: 05/02/2023]
Abstract
BACKGROUND Large amounts of various chemical contaminants, including perfluoroalkyl substances (PFASs), were released at the time of the World Trade Center (WTC) disaster. Thousands of children who lived and/or attended school near the disaster site were exposed to these substances but few studies have examined the possible consequences related to these exposures. OBJECTIVES To examine the relationship of PFASs serum levels with cardiometabolic profile in children and adolescents enrolled in the World Trade Center Health Registry (WTCHR) and a matched comparison group. METHODS We evaluated WTCHR enrollees who resided in New York City and were born between September 11, 1993 and September 10, 2001, and a matched comparison group consisting of individuals who were ineligible for WTCHR participation upon distance of their home, school or work from the WTC and lack of participation in rescue and recovery activities. Matching was based on date of birth, sex, race, ethnicity, and income. We assessed exposure to PFASs, as measured by serum levels and association with cardiometabolic profile as measured by arterial wall stiffness, body mass index, insulin resistance, fasting total cholesterol, HDL, LDL and triglycerides. RESULTS A total of 402 participants completed the study and serum samples were analyzed from 308 participants, 123 in the WTCHR group and 185 in the comparison group. In multivariable regression analysis, after adjusting for relevant confounders, we observed a significant, positive association of perfluorooctanoic acid (PFOA) with triglycerides (beta coefficient=0.14, 95% CI: 0.02, 0.27, 15.1% change), total cholesterol (beta coefficient=0.09, 95% CI: 0.04, 0.14, 9.2% change), and LDL cholesterol (beta coefficient=0.11, 95% CI: 0.03, 0.19, 11.5% change). Perfluorohexanesulfonic acid levels were associated with decreased insulin resistance (beta coefficient=-0.09, 95% CI: -0.18, -0.003, -8.6% change); PFOA and perfluorononanoic acid were associated with increased brachial artery distensibility. CONCLUSIONS This research adds to our knowledge of the physical health impacts in a large group of children exposed to the WTC disaster. Abnormal lipid levels in young adults might be an early marker of atherosclerosis and cardiovascular diseases and our findings highlight the importance of conducting longitudinal studies in this population.
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Affiliation(s)
- Tony T Koshy
- Pediatrics, New York University School of Medicine, New York, NY, USA
| | - Teresa M Attina
- Pediatrics, New York University School of Medicine, New York, NY, USA
| | - Akhgar Ghassabian
- Pediatrics, New York University School of Medicine, New York, NY, USA; Environmental Medicine, New York University School of Medicine, New York, NY, USA
| | - Joseph Gilbert
- Pediatrics, New York University School of Medicine, New York, NY, USA
| | - Lauren K Burdine
- Pediatrics, New York University School of Medicine, New York, NY, USA
| | - Michael Marmor
- Environmental Medicine, New York University School of Medicine, New York, NY, USA; Population Health, New York University School of Medicine, New York, NY, USA; Medicine, New York University School of Medicine, New York, NY, USA
| | - Masato Honda
- Wadsworth Center, New York State Department of Health, Albany, NY, USA
| | - Dinh Binh Chu
- Wadsworth Center, New York State Department of Health, Albany, NY, USA
| | - Xiaoxia Han
- Population Health, New York University School of Medicine, New York, NY, USA
| | - Yongzhao Shao
- Environmental Medicine, New York University School of Medicine, New York, NY, USA; Population Health, New York University School of Medicine, New York, NY, USA
| | | | - Elaine M Urbina
- Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, OH, USA
| | - Leonardo Trasande
- Pediatrics, New York University School of Medicine, New York, NY, USA; Environmental Medicine, New York University School of Medicine, New York, NY, USA; Population Health, New York University School of Medicine, New York, NY, USA; Medicine, New York University School of Medicine, New York, NY, USA; NYU Wagner School of Public Service, New York, NY, USA; NYU College of Global Public Health, New York, NY, USA.
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Trasande L, Koshy TT, Gilbert J, Burdine LK, Attina TM, Ghassabian A, Honda M, Marmor M, Chu DB, Han X, Shao Y, Kannan K. Serum perfluoroalkyl substances in children exposed to the world trade center disaster. Environ Res 2017; 154:212-221. [PMID: 28104511 PMCID: PMC5328959 DOI: 10.1016/j.envres.2017.01.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 01/06/2017] [Accepted: 01/08/2017] [Indexed: 05/18/2023]
Abstract
The World Trade Center (WTC) disaster released large amounts of various chemical substances into the environment, including perfluoroalkyl substances (PFASs). Yet, no studies have examined exposures in children living or attending schools near the disaster site. We measured serum PFASs in WTC Health Registry (WTCHR) respondents who were ≤8 years of age on September 11, 2001 and a sociodemographically-matched comparison group. We also examined the relationship of PFASs levels with dust cloud exposure; home dust exposure, and with traumatic exposure, the latter to take into account differences related to possible mental health consequences and associated behavioral problems. Serum samples, collected between 2014 and 2016, were analyzed from 123 WTCHR participants and from 185 participants in the comparison group. In the WTCHR group, median perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) levels were 1.81ng/mL and 3.72ng/mL, respectively. Controlling for sex, caloric intake, race/ethnicity, and date of birth, significant increases among WTCHR participants compared with the matched comparison group were detected for perfluorohexanesulfonate (0.23ng/mL increase or 0.24log unit increase, p=0.006); PFOS (0.86ng/mL increase or 0.16log unit increase, p=0.011); PFOA (0.35ng/mL increase or 0.18log unit increase, p<0.001); perfluorononanoic acid (0.12ng/mL increase or 0.17log unit increase, p=0.003); perfluorodecanoic acid (0.06ng/mL increase or 0.42log unit increase, p<0.001); and perfluoroundecanoic acid (0.03ng/mL increase or 0.32log unit increase, p=0.019). Stronger associations were identified for home dust exposures and traumatic exposures than dust cloud. These findings highlight the importance of conducting longitudinal studies in this population to assess possible cardiometabolic and renal consequences related to these exposures.
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Affiliation(s)
- Leonardo Trasande
- Department of Pediatrics, New York University School of Medicine, New York, NY, USA; Department of Environmental Medicine, New York University School of Medicine, New York, NY, USA; Department of Population Health, New York University School of Medicine, New York, NY, USA; Department of Medicine, New York University School of Medicine, New York, NY, USA; NYU Wagner School of Public Service, New York, NY, USA; NYU College of Global Public Health, New York, NY, USA.
| | - Tony T Koshy
- Department of Pediatrics, New York University School of Medicine, New York, NY, USA
| | - Joseph Gilbert
- Department of Pediatrics, New York University School of Medicine, New York, NY, USA
| | - Lauren K Burdine
- Department of Pediatrics, New York University School of Medicine, New York, NY, USA
| | - Teresa M Attina
- Department of Pediatrics, New York University School of Medicine, New York, NY, USA
| | - Akhgar Ghassabian
- Department of Pediatrics, New York University School of Medicine, New York, NY, USA
| | - Masato Honda
- Wadsworth Center, New York State Department of Health, Albany, NY, USA
| | - Michael Marmor
- Department of Environmental Medicine, New York University School of Medicine, New York, NY, USA; Department of Population Health, New York University School of Medicine, New York, NY, USA; Department of Medicine, New York University School of Medicine, New York, NY, USA
| | - Dinh Binh Chu
- Wadsworth Center, New York State Department of Health, Albany, NY, USA
| | - Xiaoxia Han
- Department of Population Health, New York University School of Medicine, New York, NY, USA
| | - Yongzhao Shao
- Department of Environmental Medicine, New York University School of Medicine, New York, NY, USA; Department of Population Health, New York University School of Medicine, New York, NY, USA
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12
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Graf MMH, Sucharitakul J, Bren U, Chu DB, Koellensperger G, Hann S, Furtmüller PG, Obinger C, Peterbauer CK, Oostenbrink C, Chaiyen P, Haltrich D. Reaction of pyranose dehydrogenase from Agaricus meleagris with its carbohydrate substrates. FEBS J 2015; 282:4218-41. [PMID: 26284701 PMCID: PMC4950071 DOI: 10.1111/febs.13417] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Revised: 08/04/2015] [Accepted: 08/13/2015] [Indexed: 01/25/2023]
Abstract
Monomeric Agaricus meleagris pyranose dehydrogenase (AmPDH) belongs to the glucose-methanol-choline family of oxidoreductases. An FAD cofactor is covalently tethered to His103 of the enzyme. AmPDH can double oxidize various mono- and oligosaccharides at different positions (C1 to C4). To study the structure/function relationship of selected active-site residues of AmPDH pertaining to substrate (carbohydrate) turnover in more detail, several active-site variants were generated, heterologously expressed in Pichia pastoris, and characterized by biochemical, biophysical and computational means. The crystal structure of AmPDH shows two active-site histidines, both of which could take on the role as the catalytic base in the reductive half-reaction. Steady-state kinetics revealed that His512 is the only catalytic base because H512A showed a reduction in (kcat /KM )glucose by a factor of 10(5) , whereas this catalytic efficiency was reduced by two or three orders of magnitude for His556 variants (H556A, H556N). This was further corroborated by transient-state kinetics, where a comparable decrease in the reductive rate constant was observed for H556A, whereas the rate constant for the oxidative half-reaction (using benzoquinone as substrate) was increased for H556A compared to recombinant wild-type AmPDH. Steady-state kinetics furthermore indicated that Gln392, Tyr510, Val511 and His556 are important for the catalytic efficiency of PDH. Molecular dynamics (MD) simulations and free energy calculations were used to predict d-glucose oxidation sites, which were validated by GC-MS measurements. These simulations also suggest that van der Waals interactions are the main driving force for substrate recognition and binding.
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Affiliation(s)
- Michael M H Graf
- Food Biotechnology Laboratory, Department of Food Science and Technology, University of Natural Resources and Life Sciences Vienna (BOKU), Austria
| | - Jeerus Sucharitakul
- Department of Biochemistry, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | - Urban Bren
- Institute of Molecular Modeling and Simulation, University of Natural Resources and Life Sciences Vienna (BOKU), Austria
- Laboratory for Physical Chemistry and Chemical Thermodynamics, Faculty of Chemistry and Chemical Technology, University of Maribor, Slovenia
| | - Dinh Binh Chu
- Division of Analytical Chemistry, Department of Chemistry, University of Natural Resources and Life Sciences Vienna (BOKU), Austria
- School of Chemical Engineering, Department of Analytical Chemistry, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Gunda Koellensperger
- Institute of Analytical Chemistry, Faculty of Chemistry, University of Vienna, Austria
| | - Stephan Hann
- Division of Analytical Chemistry, Department of Chemistry, University of Natural Resources and Life Sciences Vienna (BOKU), Austria
| | - Paul G Furtmüller
- Division of Biochemistry, Department of Chemistry, University of Natural Resources and Life Sciences Vienna (BOKU), Austria
| | - Christian Obinger
- Division of Biochemistry, Department of Chemistry, University of Natural Resources and Life Sciences Vienna (BOKU), Austria
| | - Clemens K Peterbauer
- Food Biotechnology Laboratory, Department of Food Science and Technology, University of Natural Resources and Life Sciences Vienna (BOKU), Austria
| | - Chris Oostenbrink
- Institute of Molecular Modeling and Simulation, University of Natural Resources and Life Sciences Vienna (BOKU), Austria
| | - Pimchai Chaiyen
- Department of Biochemistry and Center of Excellence in Protein Structure and Function, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Dietmar Haltrich
- Food Biotechnology Laboratory, Department of Food Science and Technology, University of Natural Resources and Life Sciences Vienna (BOKU), Austria
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Neubauer S, Chu DB, Marx H, Sauer M, Hann S, Koellensperger G. LC-MS/MS-based analysis of coenzyme A and short-chain acyl-coenzyme A thioesters. Anal Bioanal Chem 2015; 407:6681-8. [PMID: 26168961 DOI: 10.1007/s00216-015-8825-9] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Revised: 06/03/2015] [Accepted: 06/03/2015] [Indexed: 11/27/2022]
Abstract
Absolute quantification of intracellular coenzyme A (CoA), coenzyme A disulfide, and short-chain acyl-coenzyme A thioesters was addressed by developing a tailored metabolite profiling method based on liquid chromatography in combination with tandem mass spectrometric detection (LC-MS/MS). A reversed phase chromatographic separation was established which is capable of separating a broad spectrum of CoA, its corresponding derivatives, and their isomers despite the fact that no ion-pairing reagent was used (which was considered as a key advantage of the method). Excellent analytical figures of merit such as high sensitivity (LODs in the nM to sub-nM range) and high repeatability (routinely 4 %; N = 15) were obtained. Method validation comprised a study on standard purity, stability, and recoveries during sample preparation. Uniformly labeled U(13)C yeast cell extracts offered ideal internal standards for validation purposes and for a quantification exercise in the rumen bacterium Megasphaera elsdenii.
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Affiliation(s)
- Stefan Neubauer
- Department of Chemistry, Division of Analytical Chemistry, University of Natural Resources and Life Sciences-BOKU, 1190, Vienna, Austria
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Klavins K, Chu DB, Hann S, Koellensperger G. Fully automated on-line two-dimensional liquid chromatography in combination with ESI MS/MS detection for quantification of sugar phosphates in yeast cell extracts. Analyst 2015; 139:1512-20. [PMID: 24471156 DOI: 10.1039/c3an01930f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
A mass spectrometric quantitative assay was developed for the analysis of 10 sugar phosphates in the yeast Pichia pastoris. As a novelty, two-dimensional chromatography based on a fully automated heart-cutting LC-LC technique was introduced. Using a ten-port valve, ten fractions of the first chromatographic dimension, i.e. anion exchange chromatography (AEC), were transferred and separated by the orthogonal second dimension, i.e. separation on porous graphitized carbon. The chromatographic separation on the second dimension was optimized for each transferred fraction minimizing the separation time and ensuring complete removal of the salt constituents of the AEC eluents. The latter being crucial for electrospray mass spectrometric detection was confirmed by combining the LC-LC separation with on-line ICP-MS detection. These measurements showed that sodium elution was completed after 0.8 min. Consequently, an analysis time of 1 min per transferred peak was established. In this way, the excellent peak capacity given by ion exchange could be conserved in the second dimension at the same time enabling mass spectrometric detection. Sub-μM limits of detection could be obtained by the new LC-LC-MS/MS methods ranging between 0.03 and 0.19 μM for the investigated compounds (only 3GAP showed a LOD of 1 μM). The method was applied to the quantification of ten sugar phosphates in yeast extracts utilizing internal standardization with a fully labeled (13)C yeast extract. Typically, the standard uncertainties for N = 3 replicates assessed by the LC-LC-MS/MS set-up were <5%.
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Affiliation(s)
- Kristaps Klavins
- University of Natural Resources and Life Sciences, BOKU-Vienna, Department of Chemistry, Division of Analytical Chemistry, Muthgasse 18, 1190, Vienna, Austria.
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Chu DB, Troyer C, Mairinger T, Ortmayr K, Neubauer S, Koellensperger G, Hann S. Isotopologue analysis of sugar phosphates in yeast cell extracts by gas chromatography chemical ionization time-of-flight mass spectrometry. Anal Bioanal Chem 2015; 407:2865-75. [PMID: 25673246 DOI: 10.1007/s00216-015-8521-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2014] [Revised: 01/17/2015] [Accepted: 01/27/2015] [Indexed: 01/05/2023]
Abstract
Metabolic flux analysis is based on the measurement of isotopologue ratios. In this work, a new GC-MS-based method was introduced enabling accurate determination of isotopologue distributions of sugar phosphates in cell extracts. A GC-TOFMS procedure was developed involving a two-step online derivatization (ethoximation followed by trimethylsilylation) offering high mass resolution, high mass accuracy and the potential of retrospective data analysis typical for TOFMS. The information loss due to fragmentation intrinsic for isotopologue analysis by electron ionization could be overcome by chemical ionization with methane. A thorough optimization regarding pressure of the reaction gas, emission current, electron energy and temperature of the ion source was carried out. For a substantial panel of sugar phosphates both of the glycolysis and the pentose phosphate pathway, sensitive determination of the protonated intact molecular ions together with low abundance fragment ions was successfully achieved. The developed method was evaluated for analysis of Pichia pastoris cell extracts. The measured isotopologue ratios were in the range of 55:1-2:1. The comparison of the experimental isotopologue fractions with the theoretical fractions was excellent, revealing a maximum bias of 4.6% and an average bias of 1.4%.
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Affiliation(s)
- Dinh Binh Chu
- Division of Analytical Chemistry, Department of Chemistry, University of Natural Resources and Life Sciences, BOKU Vienna, Muthgasse 18, 1190, Vienna, Austria
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16
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Neubauer S, Rugova A, Chu DB, Drexler H, Ganner A, Sauer M, Mattanovich D, Hann S, Koellensperger G. Mass spectrometry based analysis of nucleotides, nucleosides, and nucleobases--application to feed supplements. Anal Bioanal Chem 2012; 404:799-808. [PMID: 22752403 DOI: 10.1007/s00216-012-6170-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2012] [Revised: 05/09/2012] [Accepted: 05/30/2012] [Indexed: 01/07/2023]
Abstract
In this work, accurate MS-based methods for quantitative profiling of nucleotides, nucleosides, and nucleobases in yeast extracts used as additives in animal feedstuff are presented. Reversed-phase chromatography utilizing a stationary phase compatible with 100% aqueous mobile phases resulted in superior analytical figures of merit than HILIC or ion-pair reversed-phase separation. The novel separation method was combined with both molecular and elemental mass spectrometry. By use of RP-LC-MS-MS, excellent limits of detection <1 μmol L(-1) could be obtained for all the compounds investigated. The elemental speciation analysis approach enabled determination of nucleotides by phosphorus detection. Sensitivity of LC-ICP-MS was 1-2 orders of magnitude lower than that of LC-MS-MS. Quantitative analysis of yeast products using complementary MS detection furnished values in good agreement.
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Affiliation(s)
- Stefan Neubauer
- Department of Chemistry, Division of Analytical Chemistry, University of Natural Resources and Life Sciences-BOKU, Vienna, Austria
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