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Nian Q, Meng E, Li F, Wang C, Zhang Q, Li J, Xu Q. Simultaneous monitoring of multiple prohibited drugs in various aquatic products. Food Chem 2024; 456:139974. [PMID: 38850605 DOI: 10.1016/j.foodchem.2024.139974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 05/15/2024] [Accepted: 06/02/2024] [Indexed: 06/10/2024]
Abstract
Both sedative and antipathogenic drugs are often found to be illegally used in aquaculture, but there is a lack of simultaneous monitoring methods. A method for simultaneously monitoring multiple prohibited drugs in various aquatic product samples was developed in this work, including fish, shrimp, crab, and shellfish. Sulfonic acid-functionalized magnetic graphitic carbon nitride (S-MGCN) was synthesized and validated to efficiently co-extract all targets (adsorption efficiency over 90.07%) through various adsorption mechanisms such as electrostatic interaction, hydrogen bonding, and π-π interaction while demonstrating good sample matrix purification ability (matrix effect below 13.60%). A new magnetic solid-phase extraction method based on S-MGCN was subsequently established. Coupled with UPLC-MS/MS, the detection limits were 0.030.075 μg /kg, and the recoveries ranged from 88.76% to 111.74% with the RSDs lower than 14.60%, indicating that the developed method has good sensitivity, accuracy, and precision. Further validation of its practicality was achieved through actual sample analysis.
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Affiliation(s)
- Qixun Nian
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China
| | - Erqiong Meng
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China
| | - Feng Li
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China
| | - Chunmin Wang
- Suzhou Municipal Center for Disease Prevention and Control, Suzhou 215004, China
| | - Qiuping Zhang
- Suzhou Municipal Center for Disease Prevention and Control, Suzhou 215004, China
| | - Jingjing Li
- Jiangxi Science and Technology Normal University, Nanchang 330013, China
| | - Qian Xu
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China.
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2
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Xiang Y, Yan X, Chen C, Guo Y, Liu H, Li Y, Wu D. Low flow-resistance solid phase extraction of fluoroquinolones in water and food samples by high-pressure wet spinning porous polyimide microfibers. J Chromatogr A 2024; 1729:465040. [PMID: 38838450 DOI: 10.1016/j.chroma.2024.465040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Revised: 03/08/2024] [Accepted: 05/31/2024] [Indexed: 06/07/2024]
Abstract
In this work, porous polyimide microfibers (PI-μF) were prepared by high-pressure wet spinning method, and successfully applied as adsorbents for solid phase extraction (SPE) of fluoroquinolones (FQs) in water and food samples. The PI-μFs of ∼10, 25, 50, 100 μm in diameter could be controlled by the inner diameter of quartz capillary nozzles. The flow resistance of SPE cartridges packed with 10 μm PI microfiber (10-PI-μF) and 25-PI-μF was comparable to or even lower than that of commercial SPE cartridges, while the flow resistance of 50-PI-μF and 100-PI-μF SPE cartridges was increased obviously due to tiny broken pieces. The 10-PI-μF and 25-PI-μF have a specific surface area of 102 m2 g-1 and 76 m2 g-1, mesopores of 22-32 nm, and large breakthrough volume of 110 mL/5 mg and 85 mL/5 mg for FQs, while the 50-PI-μF and 100-PI-μF had much lower specific surface area and hardly had retention for FQs. FQs from tap water, egg and milk samples were then extracted by PI-μF SPE, and analyzed by high performance liquid chromatography-fluorescence detector (HPLC-FLD). SPE parameters as type of elution solvent, elution solvent volume, pH value of sample solution, flow rate of sample solution, and breakthrough volume were first optimized in detail. Under the optimal conditions, the PI-μF SPE/HPLC-FLD method showed high recoveries (96.8%-107%), wide linearity (0.05-50 μg L-1, or 0.01-10 μg L-1), high determination coefficients (R2 ≥0.9992), and low limits of detection (LODs, 0.005-0.014 μg L-1). For the real tap water, egg and milk samples, the recoveries and RSDs were 81-119% and 0.8-9.8%, respectively. The results show that porous microfiber up to 25 μm in diameter is a promising solid-phase extraction adsorbent with the lowest flow resistance that can be used for trace organic pollutants in water and food samples.
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Affiliation(s)
- Yuqian Xiang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, State Key Laboratory Base of Novel Functional Materials and Preparation Science, School of Materials Science & Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China
| | - Xiaohui Yan
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, State Key Laboratory Base of Novel Functional Materials and Preparation Science, School of Materials Science & Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China
| | - Cheng Chen
- Healthy & Intelligent Kitchen Engineering Research Center of Zhejiang Province, Ningbo, Zhejiang, China
| | - Yaoshen Guo
- Healthy & Intelligent Kitchen Engineering Research Center of Zhejiang Province, Ningbo, Zhejiang, China
| | - Hongxing Liu
- Healthy & Intelligent Kitchen Engineering Research Center of Zhejiang Province, Ningbo, Zhejiang, China
| | - Yanshuo Li
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, State Key Laboratory Base of Novel Functional Materials and Preparation Science, School of Materials Science & Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China
| | - Dapeng Wu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, State Key Laboratory Base of Novel Functional Materials and Preparation Science, School of Materials Science & Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China.
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Khongkla S, Nurerk P, Udomsri P, Jullakan S, Bunkoed O. A monolith graphene oxide and mesoporous carbon composite sorbent in polyvinyl alcohol cryogel to extract and enrich fluoroquinolones in honey. J Food Compost Anal 2023. [DOI: 10.1016/j.jfca.2023.105288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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4
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Mohammad REA, Elbashir AA, Karim J, Yahaya N, Rahim NY, Miskam M. Development of deep eutectic solvents based ferrofluid for liquid phase microextraction of ofloxacin and sparfloxacin in water samples. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107806] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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5
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Wu Y, Zhong D, Qiu Q, Yan X, Wu D. Nanoporous Polyimide Microspheres Solid Phase Extraction Coupled to Liquid Chromatography with Fluorescence Detection to Determine Fluoroquinolones in Water and Food Samples. Chromatographia 2022. [DOI: 10.1007/s10337-022-04196-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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6
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Wang SH, Ma N, Zang XH, Zhang SH, Wang JP, Wu NP. Determination of fluoroquinolones in chicken muscle by molecularly imprinted graphitic carbon nitride-based solid-phase extraction and ultra-performance liquid chromatography. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2022; 39:901-911. [PMID: 35312418 DOI: 10.1080/19440049.2022.2037728] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
A graphitic carbon nitride was synthesised and nalidixic acid (NA) based molecularly imprinted microspheres (MIMs) were polymerised on its surface to create a composite material. After characterisation and evaluation of its absorption ability, the composite was used to prepare a solid-phase extraction (SPE) cartridge for purification of fluoroquinolones in chicken muscle, analysed by ultra-performance liquid chromatography. The cartridge showed high absorption capacities (378-559 μg) and high recoveries (92.1-99.4%) for eight fluoroquinolones, and could be reused at least 20 times. The limits of detection for the 8 drugs were 0.2-0.8 ng g-1, and recoveries from standard fortified blank chicken muscle samples were 71.9-96.8%. This is the first study reporting the use of molecularly imprinted graphitic carbon nitride composite to determine the residue of veterinary drug in foods of animal origin.
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Affiliation(s)
- Su Han Wang
- College of Veterinary Medicine, Hebei Agricultural University, Baoding, PR China
| | - Ning Ma
- College of Veterinary Medicine, Hebei Agricultural University, Baoding, PR China
| | - Xiao Huan Zang
- College of Science, Hebei Agricultural University, Baoding, PR China
| | - Shuai Hua Zhang
- College of Science, Hebei Agricultural University, Baoding, PR China
| | - Jian Ping Wang
- College of Veterinary Medicine, Hebei Agricultural University, Baoding, PR China.,Veterinary Biological Technology Innovation Center, Baoding, PR China
| | - Ning Peng Wu
- Henan Institute of Veterinary Drug and Feed Control, Zhengzhou, PR China
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Taghvimi A, Dastmalchi S, Javadzadeh Y. Application of Carbonic Nanosheets Based on Urea Precursors as Dispersive Solid Phase Extraction Adsorbent for Extraction of Methamphetamine from Urine Samples. Adv Pharm Bull 2021; 11:624-631. [PMID: 34888209 PMCID: PMC8642798 DOI: 10.34172/apb.2021.071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 09/10/2020] [Accepted: 10/17/2020] [Indexed: 02/03/2023] Open
Abstract
Purpose: This paper established the application of synthesized graphitic carbon nitride nanosheets (GCNNs) as an influential dispersive solid phase extraction (DSPE) adsorbent in extracting methamphetamine from complicated urine media coupled with high performance liquid chromatography. Methods: The graphitic carbon nitride nanosheets (GCNNs) was synthesized easily and applied as adsorbent in the extraction process. The effective extraction parameters were investigated by one-parameter-at-a-time. Under optimized conditions the method was validated. Results: The calibration curve was plotted in the concentration range of 50-1500 ng/mL through the optimized conditions and the proposed method was validated. The method was used for the analysis of positive urine samples and showed satisfactory results with the average 99.7% relative recovery. Conclusion: The results persuade the capability of this novel method in analyzing of the positive urine samples in diverse clinical and forensic laboratories.
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Affiliation(s)
- Arezou Taghvimi
- Biotechnology Research Centre, Tabriz University of Medical Science, Tabriz, Iran
| | - Siavoush Dastmalchi
- Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran.,Faculty of Pharmacy, Near East University, POBOX:99138, Nicosia, North Cyprus, Mersin 10, Turkey
| | - Yousef Javadzadeh
- Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran.,Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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Li L, Zhang H, Zhang Q, Wang T, Hou X. Macro-microporous zeolitic imidazole framework-8/cellulose aerogel for semi-automated pipette tip solid phase extraction of fluoroquinolones in water. Anal Chim Acta 2021; 1184:338984. [PMID: 34625268 DOI: 10.1016/j.aca.2021.338984] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 08/21/2021] [Accepted: 08/21/2021] [Indexed: 12/16/2022]
Abstract
In this study, Zeolitic Imidazole Framework-8/cellulose aerogel (ZIF-8/CA) hybrid was successfully fabricated through a simple doping method and ZIF-8 acted as the major component for adsorption. In order to elucidate the adsorption mechanism deeply, molecular simulation was adopted to the expound the interaction modes between ZIF-8 and the fluoroquinolones (FQs). ZIF-8/CA was used as the adsorbent for semi-automated pipette tip solid phase extraction (PT-SPE). In combination with high performance liquid chromatography tandem fluorescence detector (HPLC-FLD), the established method was successfully employed to determine trace amount of FQs in water samples. Extraction parameters such as the content of ZIF-8, pH of sample solution, volume of sample, flow rate of sampling, type and volume of elution solvent were investigated. Under the optimized conditions, satisfactory linearity was achieved with the correlation coefficient (R2) ranging from 0.9954 to 0.9992. The limits of detection were in the range of 0.337-1.707 ng L-1. And the recoveries varied from 75.9% to 96.8% with RSD less than 8.0%. The established method was demonstrated to be sensitive, efficient and convenient.
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Affiliation(s)
- Lin Li
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, 110016, Liaoning Province, People's Republic of China
| | - Hongyu Zhang
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, 110016, Liaoning Province, People's Republic of China
| | - Qian Zhang
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, 110016, Liaoning Province, People's Republic of China
| | - Ting Wang
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang, 110016, Liaoning Province, People's Republic of China
| | - Xiaohong Hou
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang, 110016, Liaoning Province, People's Republic of China.
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Xu J, Li C, Li X, Xiao Y. Hydrophobic magnetic nanoparticle assisted catanionic surfactant supramolecular solvent microextraction of multiresidue antibiotics in water samples. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:3264-3273. [PMID: 34223565 DOI: 10.1039/d1ay00525a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
A novel extraction technique i.e. hydrophobic magnetic nanoparticle (MNP)-assisted in situ supramolecular solvent (SUPRAS) microextraction was proposed, and it was applied for the analysis of sulfonamides (SAs) and fluoroquinolones (FQs) in aqueous samples, coupled with high performance liquid chromatography-UV detection (HPLC-UV). In this extraction method, hexafluoroisopropanol-mediated salt-free catanionic surfactant based SUPRAS in situ microextraction was initially carried out; then, the SUPRAS was quickly adsorbed by the hydrophobic magnetic nanoparticles and gathered by an external magnetic field. This can greatly shorten the separation time and overcome the dependence on centrifugation, and also perform a secondary extraction of free analytes (not extracted by SUPRAS) from water samples. The magnetic separation ability of different hydrophobic MNPs was evaluated by adsorbing supramolecular aggregates from the water sample. The effective parameters affecting the extraction efficiency of the analytes were investigated and optimized using the one variable at a time method. About 3 min was required to realize the extraction of analytes with an enrichment factor (EF) of 12-53 for SAs and 79-118 for FQs. Compared with the centrifugation-assisted SUPRAS microextraction, the hydrophobic MNP-assisted SUPRAS microextraction obtained much better extraction and preconcentration efficiency. The proposed novel extraction method with HPLC-UV provided LODs of 0.21-0.76 ng mL-1 for SAs and 0.10-0.18 ng mL-1 for FQs. Good linearity was obtained with correlation coefficients ranging from 0.9962 to 0.9999. The intra- and inter-day recoveries of the target antibiotics were in the range of 92.0-111.3% with RSD% below 10.4%. The method was successfully applied to determine SAs and FQs in real water samples, such as lake water, river water, reservoir water, and wastewater.
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Affiliation(s)
- Jia Xu
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Ministry of Education), School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430071, China. and Institute of Maternal and Child Health, Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science & Technology, Wuhan, 430016, China
| | - Cao Li
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Ministry of Education), School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430071, China.
| | - Xiao Li
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Ministry of Education), School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430071, China.
| | - Yuxiu Xiao
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Ministry of Education), School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430071, China.
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Li F, Wang M, Zhou J, Yang M, Wang T. Cyclodextrin-derivatized hybrid nanocomposites as novel magnetic solid-phase extraction adsorbent for preconcentration of trace fluoroquinolones from water samples coupled with HPLC-MS/MS determination. Microchem J 2021. [DOI: 10.1016/j.microc.2021.105955] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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11
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Charoensuk J, Thonglao J, Wichaiyo B, Mukdasai K, Santaladchaiyakit Y, Srijaranai S, Mukdasai S. A simple and sensitive colorimetric sensor for cadmium (II) detection based on self-assembled trimethyl tetradecyl ammonium bromide and murexide on colloidal silica. Microchem J 2021. [DOI: 10.1016/j.microc.2020.105666] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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12
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Taghvimi A, Dastmalchi S, Javadzadeh Y. Extraction of Cyproheptadine as Potent Appetizing Stimulant in Herbal Supplements by Efficient Carbon Nitride Nanosheets as Dispersive Solid Phase Extraction Adsorbent. PHARMACEUTICAL SCIENCES 2020. [DOI: 10.34172/ps.2020.27] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Background: Application of natural-based herbal medicine is on a growing trend in some countries and people prefer to use plant-originated drugs rather than chemical-based ones. The present study describes an interesting sample preparation method for extraction and determination of cyproheptadine in herbal supplements as appetizing stimulant by using carbon nitride nanosheets as dispersive solid phase extraction method coupled with HPLCUV. Methods: Various techniques used for characterization of adsorbent such as: Infrared spectroscopy (IR), scanning electron microscopy (SEM), Zeta potential analysis and powder X-ray diffraction (XRD). Optimization of the important extraction parameters were conducted by one parameter-at-a time method. Next, method validation was carried out. Results: The optimized cyproheptadine extraction parameters were introduced and under optimized conditions the method presented a good linearity in the concentration range of 300-2000 ng/g. The limit of detection (LOD) was 100 ng/g for the introduced method. Conclusion: Quantitative analysis of fifteen real samples (Tablets or capsules) by proposed method confirmed the illegal presence of cyproheptadine in herbal appetizing stimulants supplements of the markets.
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Affiliation(s)
- Arezou Taghvimi
- Biotechnology Research Center and Student Research Committee, Tabriz University of Medical Science, Tabriz, Iran
| | - Siavoush Dastmalchi
- Biotechnology Research Center and Faculty of Pharmacy, Tabriz University of Medical Science, Tabriz, Iran
- Faculty of Pharmacy, Near East University, POBOX: 99138, Nicosia, North Cyprus, Mersin 10, Turkey
| | - Yousef Javadzadeh
- Biotechnology Research Center and Faculty of Pharmacy, Tabriz University of Medical Science, Tabriz, Iran
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Liu D, Peng J, Chen L, Zhang Y, Han X, Yang P, He H. Solid phase extraction-based magnetic carbon nitride/metal organic framework composite with high performance liquid chromatography for the determination of tyrosine kinase inhibitors in urine samples. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2020; 12:4798-4805. [PMID: 32955051 DOI: 10.1039/d0ay01243b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this study, a novel solid phase extraction method was constructed to detect three tyrosine kinase inhibitors (TKIs) in urine with a high-performance liquid chromatography-diode array detector. The sorbent MCN/BIF-20 was constructed by magnetic g-C3N4 (MCN) and boron imidazole framework-20 (BIF-20) and was characterized by multiple techniques. The experimental results of the adsorption isotherm and adsorption kinetics indicated that the composites had good adsorption of TKIs (148.33 mg g-1, 283.25 mg g-1, 188.17 mg g-1). The reason for the good adsorption property of the complex material was revealed by comparison with each single material. The analytical method was built by a single factor experiment, and was evaluated as a suitable method to detect TKIs in urine by its good accuracy (90.35-98.69%), precision (<3.9%), appropriate detection limits (2.2-3.4 ng mL-1), and linear ranges (12.5-500 ng mL-1) with convenient determination coefficients (>0.9997). The performance of the MCN/BIF-20 composite did not decrease dramatically in 3 cycles. These analytical results demonstrated that g-C3N4 and BIFs had a bright prospect in sample pretreatment, and the proposed approach based on MCN/BIF-20 was applicable for analysis of TKIs in urine.
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Affiliation(s)
- Donghao Liu
- Department of Analytical Chemistry, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, Jiangsu Province, China.
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Li N, Zhao T, Du L, Zhang Z, Nian Q, Wang M. Fast and simple determination of estrogens in milk powders by magnetic solid-phase extraction using carbon nitride composites prior to HPLC. Anal Bioanal Chem 2020; 413:215-223. [PMID: 33068132 DOI: 10.1007/s00216-020-02993-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 09/25/2020] [Accepted: 10/06/2020] [Indexed: 10/23/2022]
Abstract
A graphitic carbon nitride (g-C3N4/Fe3O4)-based magnetic solid-phase extraction (MSPE) approach was established for fast and simple analysis of estrogens in milk powders. The composites were characterized by X-ray diffractometer, scanning electron microscope, and Brunauer-Emmett-Teller surface area and pore size distribution analyzer. Compared with the bulk g-C3N4, g-C3N4/Fe3O4 gave a narrower distribution of mesopores and provided an enhanced surface area from 77.1 to 113.7 m2/g. Polar analytes of estrogens were selected as model compounds and the extraction of four estrogens was achieved in n-hexane using 15 mg of adsorbent within only 2 min. Possible extraction mechanism of g-C3N4/Fe3O4 for these estrogens was explored in terms of the polarity of the analytes and the adsorption performance of the adsorbent. The hydrophobicity and the hydrogen-bond interaction between the estrogens and g-C3N4 were responsible for the efficient adsorption. Combined with HPLC, MSPE with the prepared adsorbent gave the enhancement factors of 20 to 24 and the linear ranges of 2-200 μg/kg for 17β-estradiol and 17α-ethinylestradiol, 1.5-150 μg/kg for estrone, and 3-300 μg/kg for hexestrol. The detection limits and quantification limits for the estrogens in milk powders were 0.5-0.9 μg/kg and 1.5-3.0 μg/kg, respectively. The recoveries varied from 75.1 to 97.2%, with the intra-day and inter-day precisions ≤ 14.2%. Furthermore, the enrichment of the analytes and the clean-up of fat and protein interferences were achieved simultaneously with one-step g-C3N4-based MSPE. The present method was convenient, fast, and sensitive, and therefore could be successfully applied for the determination of estrogens in milk powders. Graphical abstract.
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Affiliation(s)
- Na Li
- School of Public Health, North China University of Science and Technology, No.21 Bohai Road, Caofeidian, Tangshan, 063210, Hebei, China
| | - Tengwen Zhao
- School of Public Health, North China University of Science and Technology, No.21 Bohai Road, Caofeidian, Tangshan, 063210, Hebei, China
| | - Li Du
- School of Public Health, North China University of Science and Technology, No.21 Bohai Road, Caofeidian, Tangshan, 063210, Hebei, China
| | - Ziyang Zhang
- School of Public Health, North China University of Science and Technology, No.21 Bohai Road, Caofeidian, Tangshan, 063210, Hebei, China
| | - Qixun Nian
- School of Public Health, North China University of Science and Technology, No.21 Bohai Road, Caofeidian, Tangshan, 063210, Hebei, China
| | - Manman Wang
- School of Public Health, North China University of Science and Technology, No.21 Bohai Road, Caofeidian, Tangshan, 063210, Hebei, China.
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Speltini A, Merlo F, Maraschi F, Villani L, Profumo A. HA-C@silica sorbent for simultaneous extraction and clean-up of steroids in human plasma followed by HPLC-MS/MS multiclass determination. Talanta 2020; 221:121496. [PMID: 33076100 DOI: 10.1016/j.talanta.2020.121496] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 07/28/2020] [Accepted: 07/30/2020] [Indexed: 02/07/2023]
Abstract
Aim and novelty of this work are the development of a simple and straightforward analytical procedure for multiclass determination of steroid hormones in human plasma. The method entails a single pre-treatment step based on solid-phase extraction using a recently proposed sorbent phase (HA-C@silica). This is easily prepared with good reproducibility via pyrolysis of humic acids onto silica, and not yet tested in biological fluids. It proved to be advantageous as it showed poor affinity for the protein matrix constituents while quantitatively extracting and pre-concentrating the target analytes. Indeed, as demonstrated in bovine serum albumin solution, up to ca. 90% protein is not retained by the sorbent, similarly to the behaviour of restricted access carbon nanotubes, tested for comparison. The high albumin exclusion allowed a satisfactory clean-up avoiding protein precipitation and centrifugation before extraction. The extraction procedure, optimized by a chemometric approach (23 experimental design) in BSA solution, provided quantitative recovery (76-119%, n = 3) for all steroids working with 1:8-diluted plasma (2 mL) and 100 mg HA-C@silica. Before analytes elution by 1 mL methanol-acetonitrile (1:1, v/v), selective washings (2% v/v formic acid and 30% v/v methanol) were applied to remove the small fraction of retained proteins, thus obtaining very clean SPE extracts to be analyzed by HPLC-ESI-MS/MS. This allowed identification/quantification (MRM mode) at few ng mL-1 by a single chromatographic run. The procedure was verified in blank-certified foetal bovine serum (spikes 10-100 ng mL-1), obtaining good recovery and suitable inter-day precision (RSDs < 15%, n = 3). The analytical method, applied to real plasma samples analysis, is appealing in terms of sample throughput, extraction efficiency and clean-up.
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Affiliation(s)
- Andrea Speltini
- Department of Drug Sciences, University of Pavia, Via Taramelli 12, 27100, Pavia, Italy.
| | - Francesca Merlo
- Department of Chemistry, University of Pavia, Via Taramelli 12, 27100, Pavia, Italy
| | - Federica Maraschi
- Department of Chemistry, University of Pavia, Via Taramelli 12, 27100, Pavia, Italy
| | - Luana Villani
- Department of Chemistry, University of Pavia, Via Taramelli 12, 27100, Pavia, Italy
| | - Antonella Profumo
- Department of Chemistry, University of Pavia, Via Taramelli 12, 27100, Pavia, Italy.
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Xu G, Dong X, Hou L, Wang X, Liu L, Ma H, Zhao RS. Room-temperature synthesis of flower-shaped covalent organic frameworks for solid-phase extraction of quinolone antibiotics. Anal Chim Acta 2020; 1126:82-90. [DOI: 10.1016/j.aca.2020.05.071] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 05/25/2020] [Accepted: 05/29/2020] [Indexed: 12/17/2022]
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17
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Restricted access media-imprinted nanomaterials based on a metal–organic framework for highly selective extraction of fluoroquinolones in milk and river water. J Chromatogr A 2020; 1626:461364. [DOI: 10.1016/j.chroma.2020.461364] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 06/20/2020] [Accepted: 06/20/2020] [Indexed: 12/12/2022]
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18
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Core-Shell Molecularly Imprinted Polymers on Magnetic Yeast for the Removal of Sulfamethoxazole from Water. Polymers (Basel) 2020; 12:polym12061385. [PMID: 32575714 PMCID: PMC7362263 DOI: 10.3390/polym12061385] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 06/16/2020] [Accepted: 06/17/2020] [Indexed: 02/07/2023] Open
Abstract
In this work, magnetic yeast (MY) was produced through an in situ one-step method. Then, MY was used as the core and the antibiotic sulfamethoxazole (SMX) as the template to produce highly selective magnetic yeast-molecularly imprinted polymers (MY@MIPs). The physicochemical properties of MY@MIPs were assessed by Fourier-transform infrared spectroscopy (FT-IR), a vibrating sample magnetometer (VSM), X-ray diffraction (XRD), thermogravimetric analysis (TGA), specific surface area (SBET) determination, and scanning electron microscopy (SEM). Batch adsorption experiments were carried out to compare MY@MIPs with MY and MY@NIPs (magnetic yeast-molecularly imprinted polymers without template), with MY@MIPs showing a better performance in the removal of SMX from water. Adsorption of SMX onto MY@MIPs was described by the pseudo-second-order kinetic model and the Langmuir isotherm, with maximum adsorption capacities of 77 and 24 mg g-1 from ultrapure and wastewater, respectively. Furthermore, MY@MIPs displayed a highly selective adsorption toward SMX in the presence of other pharmaceuticals, namely diclofenac (DCF) and carbamazepine (CBZ). Finally, regeneration experiments showed that SMX adsorption decreased 21 and 34% after the first and second regeneration cycles, respectively. This work demonstrates that MY@MIPs are promising sorbent materials for the selective removal of SMX from wastewater.
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Akhundi A, Badiei A, Ziarani GM, Habibi-Yangjeh A, Muñoz-Batista MJ, Luque R. Graphitic carbon nitride-based photocatalysts: Toward efficient organic transformation for value-added chemicals production. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.110902] [Citation(s) in RCA: 116] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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20
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Sulphonate functionalized covalent organic framework-based magnetic sorbent for effective solid phase extraction and determination of fluoroquinolones. J Chromatogr A 2020; 1612:460651. [DOI: 10.1016/j.chroma.2019.460651] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 10/19/2019] [Accepted: 10/22/2019] [Indexed: 11/21/2022]
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21
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Jian NG, Liang SH, Cao JK, Di QN, Kang K, Xu Q. A nanofiber mat prepared from sulfonated polyaniline for solid-phase extraction of fluoroquinolones from water and biological fluids prior to their quantitation by UPLC-MS/MS. Mikrochim Acta 2019; 186:857. [DOI: 10.1007/s00604-019-4033-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Accepted: 11/11/2019] [Indexed: 12/23/2022]
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22
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Miniaturized matrix solid-phase dispersion based on deep eutectic solvent and carbon nitride associated with high-performance liquid chromatography: A new feasibility for extraction and determination of trace nitrotoluene pollutants in soil samples. J Chromatogr A 2019; 1601:35-44. [DOI: 10.1016/j.chroma.2019.05.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 04/30/2019] [Accepted: 05/08/2019] [Indexed: 12/17/2022]
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23
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Nian Q, Wang X, Wang M, Zuo G. A hybrid material composed of graphitic carbon nitride and magnetite (Fe3O4) for magnetic solid-phase extraction of trace levels of hydroxylated polycyclic aromatic hydrocarbons. Mikrochim Acta 2019; 186:497. [DOI: 10.1007/s00604-019-3607-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 06/13/2019] [Indexed: 12/18/2022]
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24
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Santigosa E, Maspoch S, Ramos Payán M. Liquid phase microextraction integrated into a microchip device for the extraction of fluoroquinolones from urine samples. Microchem J 2019. [DOI: 10.1016/j.microc.2018.10.051] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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25
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Preparation of molecularly imprinted hybrid monoliths for the selective detection of fluoroquinolones in infant formula powders. J Chromatogr A 2019; 1588:33-40. [DOI: 10.1016/j.chroma.2018.12.038] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 12/12/2018] [Accepted: 12/18/2018] [Indexed: 02/06/2023]
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26
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Humic Acids Pyrolyzed onto Silica Microparticles for Solid-Phase Extraction of Benzotriazoles and Benzothiazoles from Environmental Waters. Chromatographia 2019. [DOI: 10.1007/s10337-019-03699-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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27
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Lu W, Liu J, Li J, Wang X, Lv M, Cui R, Chen L. Dual-template molecularly imprinted polymers for dispersive solid-phase extraction of fluoroquinolones in water samples coupled with high performance liquid chromatography. Analyst 2019; 144:1292-1302. [DOI: 10.1039/c8an02133c] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Dual-template molecularly imprinted polymers were synthesized using norfloxacin and enrofloxacin as templates by precipitation polymerization with a multi-template imprinting strategy.
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Affiliation(s)
- Wenhui Lu
- School of Light Industry Science and Technology
- Qilu University of Technology (Shandong Academy of Sciences)
- Jinan 250353
- China
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation
| | - Jie Liu
- School of Environment and Materials Engineering
- Yantai University
- Yantai 264005
- China
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation
| | - Jinhua Li
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation
- Research Center for Coastal Environmental Engineering and Technology
- Yantai Institute of Coastal Zone Research
- Chinese Academy of Sciences
- Yantai 264003
| | - Xiaoyan Wang
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation
- Research Center for Coastal Environmental Engineering and Technology
- Yantai Institute of Coastal Zone Research
- Chinese Academy of Sciences
- Yantai 264003
| | - Min Lv
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation
- Research Center for Coastal Environmental Engineering and Technology
- Yantai Institute of Coastal Zone Research
- Chinese Academy of Sciences
- Yantai 264003
| | - Rong Cui
- School of Environment and Materials Engineering
- Yantai University
- Yantai 264005
- China
| | - Lingxin Chen
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation
- Research Center for Coastal Environmental Engineering and Technology
- Yantai Institute of Coastal Zone Research
- Chinese Academy of Sciences
- Yantai 264003
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28
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Magnetic solid-phase extraction of fluoroquinolones from water samples using titanium-based metal-organic framework functionalized magnetic microspheres. J Chromatogr A 2018; 1579:1-8. [DOI: 10.1016/j.chroma.2018.10.019] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Revised: 09/26/2018] [Accepted: 10/13/2018] [Indexed: 11/20/2022]
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29
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Simple and Sensitive Determination of Aromatic Acids in Coconut Water by g-C3N4@SiO2 Based Solid-phase Extraction and HPLC-UV Analysis. Chem Res Chin Univ 2018. [DOI: 10.1007/s40242-018-8041-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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30
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One-pot preparation of magnetic carbon adsorbent derived from pomelo peel for magnetic solid-phase extraction of pollutants in environmental waters. J Chromatogr A 2018; 1546:28-35. [DOI: 10.1016/j.chroma.2018.03.001] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2018] [Revised: 02/25/2018] [Accepted: 03/01/2018] [Indexed: 01/12/2023]
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31
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Speltini A, Merlo F, Maraschi F, Sturini M, Contini M, Calisi N, Profumo A. Thermally condensed humic acids onto silica as SPE for effective enrichment of glucocorticoids from environmental waters followed by HPLC-HESI-MS/MS. J Chromatogr A 2018; 1540:38-46. [PMID: 29429744 DOI: 10.1016/j.chroma.2018.02.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 01/29/2018] [Accepted: 02/02/2018] [Indexed: 11/16/2022]
Abstract
Pristine humic acids (HAs) were thermally condensed onto silica microparticles by a one-pot, inexpensive and green preparation route obtaining a mixed-mode sorbent (HA-C@silica) with good sorption affinity for glucocorticoids (GCs). The carbon-based material, characterized by various techniques, was indeed applied as the sorbent for fixed-bed solid-phase extraction of eight GCs from river water and wastewater treatment plant effluent, spiked at different concentration levels in the range 1-400 ng L-1. After sample extraction, the target analytes were simultaneously and quantitatively eluted in a single fraction of methanol, achieving enrichment factor 4000 and 1000 in river water and wastewater effluent, respectively. Full recovery for all compounds, was gained in the real matrices studied (80-125% in river water, 79-126% in wastewater effluent), with inter-day precision showing relative standard deviations (RSD) below 15% and 18% (n = 3), for river and wastewater effluent, correspondingly. The high enrichment factors coupled with high-performance liquid chromatography tandem mass spectrometry quantification (MRM mode) provided method quantification limits of 0.009-0.48 ng L-1 in river water and 0.06-3 ng L-1 in wastewater effluent and, at the same time, secure identification of the selected drugs. As also evidenced by comparison with literature, HA-C@silica proved to be a valid alternative to the current commercial sorbents, in terms of extraction capability, enrichment factor, ease of preparation and cost. The batch-to-batch reproducibility was assessed by recovery tests on three independently prepared HA-C@silica powders (RSD lower than 7%).
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Affiliation(s)
- Andrea Speltini
- Department of Chemistry, University of Pavia, via Taramelli 12, 27100 Pavia, Italy.
| | - Francesca Merlo
- Department of Chemistry, University of Pavia, via Taramelli 12, 27100 Pavia, Italy
| | - Federica Maraschi
- Department of Chemistry, University of Pavia, via Taramelli 12, 27100 Pavia, Italy
| | - Michela Sturini
- Department of Chemistry, University of Pavia, via Taramelli 12, 27100 Pavia, Italy
| | - Matteo Contini
- Department of Chemistry, University of Pavia, via Taramelli 12, 27100 Pavia, Italy
| | - Nicola Calisi
- Department of Chemistry, University of Florence, via della Lastruccia 3, 50019, Sesto Fiorentino, Italy; INSTM Research Unit of Firenze, via della Lastruccia 3, I-50019 Sesto Fiorentino, Italy
| | - Antonella Profumo
- Department of Chemistry, University of Pavia, via Taramelli 12, 27100 Pavia, Italy.
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32
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Metarwiwinit S, Mukdasai S, Poonsawat C, Srijaranai S. A simple dispersive-micro-solid phase extraction based on a colloidal silica sorbent for the spectrophotometric determination of Fe(ii) in the presence of tetrabutylammonium bromide. NEW J CHEM 2018. [DOI: 10.1039/c7nj04172a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This study demonstrates a simplified dispersive micro-solid phase extraction (d-μ-SPE) using silica sol as the sorbent for the preconcentration of ferrous ions.
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Affiliation(s)
- S. Metarwiwinit
- Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen
- Thailand
| | - S. Mukdasai
- Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen
- Thailand
| | - C. Poonsawat
- Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen
- Thailand
| | - S. Srijaranai
- Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen
- Thailand
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33
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Speltini A, Pisanu A, Profumo A, Milanese C, Sangaletti L, Drera G, Patrini M, Pentimalli M, Malavasi L. Rationalization of hydrogen production by bulk g-C3N4: an in-depth correlation between physico-chemical parameters and solar light photocatalysis. RSC Adv 2018; 8:39421-39431. [PMID: 35558029 PMCID: PMC9090727 DOI: 10.1039/c8ra08880b] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 11/17/2018] [Indexed: 11/21/2022] Open
Abstract
The aim of this work is the systematic study of the photocatalytic activity of bulk graphitic carbon nitride (g-C3N4) in relation with the physical–chemical, structural and optical properties of the semiconductor. Fourteen g-C3N4 samples have been prepared by thermal condensation starting from three different precursor (melamine, dicyandiamide and urea) and exploring various temperatures (in the range 500–700 °C). The materials obtained have been deeply characterized by high resolution scanning electron microscopy, thermogravimetric analysis, X-ray diffraction, nitrogen adsorption measurements (BET method), X-ray photoelectron spectroscopy and diffuse reflectance spectroscopy. Each semiconductor, coupled with Pt co-catalyst, was tested for hydrogen gas production from aqueous triethanolamine as model sacrificial agent, under simulated solar light. The hydrogen evolution profiles turned out to be strictly dependent on precursor type and synthesis temperature, with the highest evolution rate observed for the samples series produced from urea (up to ca. 4400 μmol g−1 h−1). The results, corroborated by the excellent inter-day precision of irradiation tests (RSD < 5%, n = 3) together with the good batch-to-batch reproducibility (RSD < 11%, n = 3), were critically discussed. Apart from the appealing production values obtained using the as-prepared materials, it was importantly pointed out that, besides crystallinity and visible light absorption, the photocatalytic behavior is definitely correlated to the surface area, which is dependent on the synthesis conditions, that is polymerization temperature and nature of g-C3N4 precursor. Overall, this systematic investigation demonstrated that, contrary to the polymerization degree (sp2/sp3 carbon ratio), surface area is the real determinant parameter for g-C3N4 hydrogen evolution activity. Extensive physico-chemical investigation on bulk g-C3N4 allowed a reliable correlation between hydrogen production and materials properties to be established.![]()
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Affiliation(s)
- Andrea Speltini
- Department of Chemistry and INSTM
- University of Pavia
- 27100 Pavia
- Italy
| | - Ambra Pisanu
- Department of Chemistry and INSTM
- University of Pavia
- 27100 Pavia
- Italy
| | - Antonella Profumo
- Department of Chemistry and INSTM
- University of Pavia
- 27100 Pavia
- Italy
| | - Chiara Milanese
- Department of Chemistry and INSTM
- University of Pavia
- 27100 Pavia
- Italy
| | - Luigi Sangaletti
- I-LAMP
- Dipartimento di Matematica e Fisica
- Università Cattolica del Sacro Cuore
- 25121 Brescia
- Italy
| | - Giovanni Drera
- I-LAMP
- Dipartimento di Matematica e Fisica
- Università Cattolica del Sacro Cuore
- 25121 Brescia
- Italy
| | | | - Marzia Pentimalli
- ENEA – Italian National Agency for Energy
- New Technologies and Sustainable Economic Development
- Casaccia Research Centre
- 00123 Roma
- Italy
| | - Lorenzo Malavasi
- Department of Chemistry and INSTM
- University of Pavia
- 27100 Pavia
- Italy
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Ghaemmaghami M, Yamini Y, Amanzadeh H, Hosseini Monjezi B. Electrophoretic deposition of ordered mesoporous carbon nitride on a stainless steel wire as a high-performance solid phase microextraction coating. Chem Commun (Camb) 2018; 54:507-510. [DOI: 10.1039/c7cc08273h] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
An electrophoretic deposition approach was developed to fabricate a robust ordered mesoporous carbon nitride (MCN) coating for solid-phase microextraction.
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Affiliation(s)
| | - Y. Yamini
- Department of Chemistry
- Tarbiat Modares University
- Tehran
- Iran
| | - H. Amanzadeh
- Department of Chemistry
- Tarbiat Modares University
- Tehran
- Iran
| | - B. Hosseini Monjezi
- Industrial Protection Division
- Research Institute of Petroleum Industry
- Tehran
- Iran
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35
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Zhao R, Gao J, Mei S, Wu Y, Wang X, Zhai X, Yang J, Hao C, Yan J. Facile synthesis of graphitic C 3N 4 nanoporous-tube with high enhancement of visible-light photocatalytic activity. NANOTECHNOLOGY 2017; 28:495710. [PMID: 29019339 DOI: 10.1088/1361-6528/aa929a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A simple and convenient method was used to synthesize a graphitic carbon nitride (g-C3N4) nanoporous-tube by using SiO2 nanoparticles as pore formers. The structure of the g-C3N4 nanoporous-tube was characterized by the SEM and TEM images. Taking photodegradation of RhB as an example, the photocatalytic activity of the as-prepared g-C3N4 nanoporous-tube was investigated. It can photodegrade 90% RhB in 40 min under visible-light irradiation and obtain a k value of 0.04491 min-1, which is 8.16 times that of bulk g-C3N4, 3.09 times that of tubular g-C3N4 and 1.48 times that of tubular g-C3N4-SiO2. The significant enhancement in photocatalytic efficiency is due to the edge effect of the pores and the special structure of the tubes. In addition, the possible mechanism of photocatalytic degradation of RhB was also proposed based on the trapping experiment of active species, which indicated that the superoxide radicals ([Formula: see text]) and the holes (h +) were the main reactive species in this photocatalyst. This work may open up a new idea of innovation in g-C3N4 structure and inspire its follow-up study.
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Affiliation(s)
- Ruiru Zhao
- Department of Chemistry, School of Science, Tianjin University, Tianjin 300350, People's Republic of China
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36
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Dispersive multi-walled carbon nanotubes extraction of benzenesulfonamides, benzotriazoles, and benzothiazoles from environmental waters followed by microwave desorption and HPLC-HESI-MS/MS. Anal Bioanal Chem 2017; 409:6709-6718. [DOI: 10.1007/s00216-017-0627-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 09/01/2017] [Accepted: 09/06/2017] [Indexed: 10/18/2022]
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