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Wang W, Liu X, Zhang P, Wang M, Han Y, Yan H. Simultaneous determination of three biomarkers of non-small cells lung cancer in urine by pipette-tip solid-phase extraction coupled with liquid chromatography tandem mass spectrometry. J Chromatogr A 2023; 1711:464448. [PMID: 37852047 DOI: 10.1016/j.chroma.2023.464448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Revised: 10/07/2023] [Accepted: 10/10/2023] [Indexed: 10/20/2023]
Abstract
Simultaneous determination of multiple biomarkers can improve the effectiveness and accuracy of cancer diagnosis. Cortisol, cortisone, and 4-methoxyphenylacetic acid (4-Me) are metabolic biomarker group with high specificity and sensitivity for the diagnosis of non-small cells lung cancer (NSCLC), and the development of their simultaneous determination method is desired. Herein, a simple, sensitive, and low-cost method involving pipette-tip solid-phase extraction (PT-SPE) using anion exchange adsorbent (MAX) coupled with liquid chromatography tandem mass spectrometry (LC-MS/MS) was developed for the simultaneous determination of three biomarkers (cortisol, cortisone, and 4-Me) in human urine. The sample (0.1 mL), adsorbent (1.5 mg) and organic reagent (3.5 mL) of MAX-PT-SPE are less consumed, and have the advantages of easy access to raw materials, simple assembly, convenient on-site instant extraction, low pollution, and low cost. The limits of detection of the three biomarkers were 0.006-0.024 ng mL-1, the recoveries of three spiked levels (2, 50, and 500 ng mL-1) were 91.0%-99.3%, with the relative standard deviations (RSDs) ≤ 5.9%. Finally, the MAX-PT-SPE-LC-MS/MS method achieved the quantitative analysis of cortisol, cortisone, and 4-Me in urine of different patients of NSCLC. This method is expected to be used in the non-invasive auxiliary diagnosis of NSCLC, and it provides a new strategy for multi-molecular diagnosis and multi-omics combined diagnosis.
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Affiliation(s)
- Wenyan Wang
- Hebei Key Laboratory of Public Health Safety, School of Life Science, College of Public Health, College of Pharmaceutical Science, Hebei University, Baoding 071002, China
| | - Xiaohan Liu
- Hebei Key Laboratory of Public Health Safety, School of Life Science, College of Public Health, College of Pharmaceutical Science, Hebei University, Baoding 071002, China
| | - Pengfei Zhang
- Hebei Key Laboratory of Public Health Safety, School of Life Science, College of Public Health, College of Pharmaceutical Science, Hebei University, Baoding 071002, China
| | - Mingyu Wang
- Department of Pharmacy, Affiliated Hospital of Hebei University, Baoding 071002, China.
| | - Yehong Han
- Hebei Key Laboratory of Public Health Safety, School of Life Science, College of Public Health, College of Pharmaceutical Science, Hebei University, Baoding 071002, China
| | - Hongyuan Yan
- Hebei Key Laboratory of Public Health Safety, School of Life Science, College of Public Health, College of Pharmaceutical Science, Hebei University, Baoding 071002, China; State Key Laboratory of New Pharmaceutical Preparations and Excipients, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education, College of Chemistry and Materials Science, Hebei University, Baoding 071002, China.
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2
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Jamali MR, Tavakoli M, Nezhadali A. Temperature-induced dispersive solid-phase extraction as a new approach for preconcentration of Sudan dyes in water and food samples prior to the determination by high-performance liquid chromatography. J Sep Sci 2023; 46:e2300248. [PMID: 37407510 DOI: 10.1002/jssc.202300248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 05/30/2023] [Accepted: 06/23/2023] [Indexed: 07/07/2023]
Abstract
This study introduced a new microextraction method named temperature-induced dispersive solid-phase extraction. The performance of the method was demonstrated with the determination of Sudan dyes in food and natural water samples. In this method, a low quantity of sorbent was added to the aqueous solution and the mixture was shaken manually for about one minute. Then, the solution was heated in an ultrasonic water bath, and the sorbent was dissolved. Subsequently, the solution was cooled down with ice water, and consequently, the solubility of the sorbent was reduced in the sample solution and became cloudy. The phase separation was accelerated by centrifugation. The upper liquid phase was picked up using a syringe, and the remainder was solved in methanol and introduced into the HPLC for analysis. Various parameters affecting the extraction yield were evaluated. Analytical parameters, including limits of detection (0.011-0.016 μg/L) and quantification (0.038-0.055 μg/L), relative standard deviations (2.3%-3.1%), and preconcentration factor (40) proved the high efficiency of the developed method for the analysis of Sudan dyes. The proposed method was used to measure Sudan dyes in water and food samples and showed good extraction recoveries (95.0%-103.5%).
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Affiliation(s)
| | - Maedeh Tavakoli
- Department of Chemistry, Payame Noor University, Tehran, Iran
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Zhu Z, Wang L, Jia Y, Duan S, Li S, Jiang L, Lin X, Yan F, Hou C, Hu C, Di B. Magnetic Liposomes Infused with GPCR-Expressing Cell Membrane for Targeted Extraction Using Minimum Organic Solvent: An Investigative Study of Trace THC in Sewage. Anal Chem 2023; 95:12613-12622. [PMID: 37583350 DOI: 10.1021/acs.analchem.2c05397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/17/2023]
Abstract
Trace analysis of lipophilic substances in complex environmental, food, or biological matrices has proven to be a challenge, on account of their high susceptibility to adsorption by particulate matter and liquid-solid interfaces. For this purpose, liquid-liquid extraction (LLE) is often employed as the separation method, which uses water-immiscible organic solvents. As an alternative, magnetic solid-phase extraction (MSPE) allows for adsorption, separation, and recovery of analytes from large volumes of aqueous samples with minimum usage of organic solvents. However, the poor selectivity hampers its performance in various scenarios, especially in sewage samples where complicated and unpredictable interference exists, resulting in block of the active adsorption sites of the sorbent. To this end, we propose receptor-affinity MSPE employing magnetic liposomes decorated with cell membranes expressing G-protein-coupled receptor as the sorbents. Application of the novel sorbent CM@Lip@Fe infused with CB1 cannabinoid receptors was demonstrated for the targeted extraction and enrichment of tetrahydrocannabinol from sewage matrix. Thanks to the high affinity and molecular selectivity of the ligand-receptor interactions, a limit of quantitation of 5.17 ng/L was achieved coupled with HPLC-MS/MS in unfiltered raw sewage, featuring minimum usage of organic solvents, fivefold enhanced sensitivity, low sorbent dosage (75 mg/L of sewage), and high efficiency as major advantages over conventional LLE. This work establishes a framework for efficient separation of specific molecules from complex media, thus promising to extend and refine standard LLE as the clean-up procedure for trace analysis.
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Affiliation(s)
- Zhihang Zhu
- China National Narcotics Control Commission-China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, No. 24 Tongjiaxiang Road, 210009 Nanjing, PR China
- Department of Pharmacy, China Pharmaceutical University, No. 24 Tongjiaxiang Road, 210009 Nanjing, PR China
| | - Lancheng Wang
- China National Narcotics Control Commission-China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, No. 24 Tongjiaxiang Road, 210009 Nanjing, PR China
- Department of Pharmaceutical Engineering, China Pharmaceutical University, No. 24 Tongjiaxiang Road, 210009 Nanjing, PR China
| | - Yan Jia
- China National Narcotics Control Commission-China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, No. 24 Tongjiaxiang Road, 210009 Nanjing, PR China
- Department of Pharmaceutical Engineering, China Pharmaceutical University, No. 24 Tongjiaxiang Road, 210009 Nanjing, PR China
| | - Shiqi Duan
- China National Narcotics Control Commission-China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, No. 24 Tongjiaxiang Road, 210009 Nanjing, PR China
- Department of Pharmacy, China Pharmaceutical University, No. 24 Tongjiaxiang Road, 210009 Nanjing, PR China
| | - Siyu Li
- China National Narcotics Control Commission-China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, No. 24 Tongjiaxiang Road, 210009 Nanjing, PR China
- Department of Pharmacy, China Pharmaceutical University, No. 24 Tongjiaxiang Road, 210009 Nanjing, PR China
| | - Le Jiang
- China National Narcotics Control Commission-China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, No. 24 Tongjiaxiang Road, 210009 Nanjing, PR China
- Department of Pharmacy, China Pharmaceutical University, No. 24 Tongjiaxiang Road, 210009 Nanjing, PR China
| | - Xiaoxuan Lin
- China National Narcotics Control Commission-China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, No. 24 Tongjiaxiang Road, 210009 Nanjing, PR China
- Department of Pharmacy, China Pharmaceutical University, No. 24 Tongjiaxiang Road, 210009 Nanjing, PR China
| | - Fang Yan
- China National Narcotics Control Commission-China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, No. 24 Tongjiaxiang Road, 210009 Nanjing, PR China
- Department of Pharmacy, China Pharmaceutical University, No. 24 Tongjiaxiang Road, 210009 Nanjing, PR China
| | - Chenzhi Hou
- China National Narcotics Control Commission-China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, No. 24 Tongjiaxiang Road, 210009 Nanjing, PR China
- Department of Pharmacy, China Pharmaceutical University, No. 24 Tongjiaxiang Road, 210009 Nanjing, PR China
| | - Chi Hu
- China National Narcotics Control Commission-China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, No. 24 Tongjiaxiang Road, 210009 Nanjing, PR China
- Department of Pharmaceutical Engineering, China Pharmaceutical University, No. 24 Tongjiaxiang Road, 210009 Nanjing, PR China
| | - Bin Di
- China National Narcotics Control Commission-China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, No. 24 Tongjiaxiang Road, 210009 Nanjing, PR China
- Department of Pharmacy, China Pharmaceutical University, No. 24 Tongjiaxiang Road, 210009 Nanjing, PR China
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Azorín C, López-Juan AL, Aparisi F, Benedé JL, Chisvert A. Determination of hexanal and heptanal in saliva samples by an adapted magnetic headspace adsorptive microextraction for diagnosis of lung cancer. Anal Chim Acta 2023; 1271:341435. [PMID: 37328243 DOI: 10.1016/j.aca.2023.341435] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 05/25/2023] [Accepted: 05/26/2023] [Indexed: 06/18/2023]
Abstract
In this work, an analytical method for the determination of two endogenous aldehydes (hexanal and heptanal) as lung cancer biomarkers in saliva samples is presented for the first time. The method is based on a modification of magnetic headspace adsorptive microextraction (M-HS-AME) followed by gas chromatography coupled to mass spectrometry (GC-MS). For this purpose, an external magnetic field generated by a neodymium magnet is used to hold the magnetic sorbent (i.e., CoFe2O4 magnetic nanoparticles embedded into a reversed-phase polymer) in the headspace of a microtube to extract the volatilized aldehydes. Subsequently, the analytes are desorbed in the appropriate solvent and the extract is injected into the GC-MS system for separation and determination. Under the optimized conditions, the method was validated and showed good analytical features in terms of linearity (at least up to 50 ng mL-1), limits of detection (0.22 and 0.26 ng mL-1 for hexanal and heptanal, respectively), and repeatability (RSD ≤12%). This new approach was successfully applied to saliva samples from healthy volunteers and those with lung cancer, obtaining notably differences between both groups. These results reveal the prospect of the method as potential diagnostic tool for lung cancer by saliva analysis. This work contributes to the Analytical Chemistry field presenting a double novelty: on the one hand, the use of M-HS-AME in bioanalysis is unprecedentedly proposed, thus expanding the analytical potential of this technique, and, on the other hand, the determination of hexanal and heptanal is carried out in saliva samples for the first time.
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Affiliation(s)
- Cristian Azorín
- GICAPC Research Group, Department of Analytical Chemistry, University of Valencia, Burjassot, Valencia, Spain
| | - Andreu L López-Juan
- GICAPC Research Group, Department of Analytical Chemistry, University of Valencia, Burjassot, Valencia, Spain
| | - Francisco Aparisi
- Medical Oncology service. Biomarkers and Precision Medicine Unit (UBYMP). La Fe Hospital. La Fe Health Research Institute (IISLAFE), Valencia, Spain
| | - Juan L Benedé
- GICAPC Research Group, Department of Analytical Chemistry, University of Valencia, Burjassot, Valencia, Spain
| | - Alberto Chisvert
- GICAPC Research Group, Department of Analytical Chemistry, University of Valencia, Burjassot, Valencia, Spain.
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Grau J, Moreno-Guzmán M, Arruza L, López MÁ, Escarpa A, Chisvert A. Analysis of microsamples by miniaturized magnetic-based pipette tip microextraction: determination of free cortisol in serum and urine from very low birth weight preterm newborns. Analyst 2023; 148:1050-1057. [PMID: 36723348 DOI: 10.1039/d2an02085h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Miniaturized magnetic-based pipette tip microextraction is presented as a sample preparation approach for microsamples. It involves quick dispersion of a diminutive amount of a magnetic sorbent material in a low-volume sample (10 μL) to entrap the target analytes. Next, the dispersion is aspirated using a (semi)automatic pipette through a pipette tip with a small cubic neodymium magnet inside, which retrieves the magnetic sorbent containing the analytes. After discarding the rest of the sample, the sorbent is properly rinsed by aspirating/dispensing deionized water, and then, the analytes are eluted by aspirating/dispensing an appropriate solvent. This approach was employed for the determination of free cortisol in serum and urine from very low birth weight preterm newborns, a vulnerable patient group who present low availability for sampling biological fluids. A magnetic immunosorbent made of a cortisol antibody was employed for the selective extraction, followed by liquid chromatography-tandem mass spectrometry. Good analytical features were obtained, such as limits of detection and quantification of 0.08 and 0.27 ng mL-1, respectively, linearity up to 50 ng mL-1 (R2 > 0.999), RSD values under 15% and relative recoveries between 91 and 111%. The cross-reactivity with other glucocorticoids (i.e., cortisone and prednisolone) was evaluated to show the selectivity of the extraction. Finally, the method applicability was demonstrated towards the determination of free cortisol in the serum and urine samples from low birth weight preterm newborns.
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Affiliation(s)
- José Grau
- GICAPC Research Group, Department of Analytical Chemistry, University of Valencia, 46100 Burjassot, Valencia, Spain.
| | - María Moreno-Guzmán
- Department of Chemistry in Pharmaceutical Sciences, Analytical Chemistry, Faculty of Pharmacy, Complutense University of Madrid, Plaza Ramón y Cajal s/n, 28040 Madrid, Spain
| | - Luis Arruza
- Division of Neonatology, Child and Teenager Institute, Clínico San Carlos Hospital IdISCC, Madrid, Spain
| | - Miguel Ángel López
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, University of Alcala, Ctra. Madrid-Barcelona, Km. 33.600, Alcalá de Henares, 28802 Madrid, Spain. .,Chemical Research Institute "Andres M. Del Río", University of Alcala, Ctra. Madrid-Barcelona, Km. 33.600, Alcala de Henares, 28802 Madrid, Spain
| | - Alberto Escarpa
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, University of Alcala, Ctra. Madrid-Barcelona, Km. 33.600, Alcalá de Henares, 28802 Madrid, Spain. .,Chemical Research Institute "Andres M. Del Río", University of Alcala, Ctra. Madrid-Barcelona, Km. 33.600, Alcala de Henares, 28802 Madrid, Spain
| | - Alberto Chisvert
- GICAPC Research Group, Department of Analytical Chemistry, University of Valencia, 46100 Burjassot, Valencia, Spain.
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6
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Azorín C, Benedé JL, Chisvert A, Salvador A. Trace determination of tetrahydrocannabinol (THC) in cosmetic products by stir bar sorptive dispersive microextraction followed by liquid chromatography-tandem mass spectrometry. Talanta 2023; 253:123934. [PMID: 36152610 DOI: 10.1016/j.talanta.2022.123934] [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: 07/19/2022] [Revised: 09/06/2022] [Accepted: 09/08/2022] [Indexed: 12/13/2022]
Abstract
An analytical method for the determination of tetrahydrocannabinol (THC) at trace level in cosmetics is presented. As psychoactive compound, the presence of THC in consumer products should be avoided. However, it might be unintentionally present in cannabidiol-rich or hemp-based products by contamination or isomerization of cannabidiol. Due to the low concentrations expected, a sensitive and selective method is necessary for the analytical control of these products. In this sense, the presented method is based on stir bar sorptive dispersive microextraction (SBSDME) followed by liquid chromatography-tandem mass spectrometry (LC-MS/MS). In this work, a magnetic composite made of CoFe2O4 magnetic nanoparticles embedded in a commercial reverse-phase polymer (Strata™-X-RP) was employed as magnetic sorbent material taking advantage of its affinity to the target analyte. Under the optimized conditions, the method was validated and showed good analytical features in terms of linearity (at least up to 10 ng mL-1), limits of detection and quantification (2.2 and 7.2 ng g-1, respectively) and repeatability (RSD <10%). Moreover, relative recoveries between 99 and 109% were obtained, showing matrix effects were negligible using deuterated THC (THC-D3) as surrogate. This new approach was successfully applied to ten commercially-available cosmetic samples of different matrices, thus showing it is suitable for the analytical control of THC in cosmetic products. The proposed methodology overcomes some of the drawbacks of the previous works with the same purpose, such as the higher limits of detection, time-consuming procedures, and consumption of large volumes of organic solvents.
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Affiliation(s)
- Cristian Azorín
- GICAPC Research Group, Department of Analytical Chemistry, University of Valencia, 46100 Burjassot, Valencia, Spain
| | - Juan L Benedé
- GICAPC Research Group, Department of Analytical Chemistry, University of Valencia, 46100 Burjassot, Valencia, Spain
| | - Alberto Chisvert
- GICAPC Research Group, Department of Analytical Chemistry, University of Valencia, 46100 Burjassot, Valencia, Spain.
| | - Amparo Salvador
- GICAPC Research Group, Department of Analytical Chemistry, University of Valencia, 46100 Burjassot, Valencia, Spain
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Synthesis of gold and copper bimetallic nanoclusters with papain for fluorescence detection of cortisone in biological samples. Anal Bioanal Chem 2023; 415:335-343. [PMID: 36355222 DOI: 10.1007/s00216-022-04412-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 10/15/2022] [Accepted: 10/28/2022] [Indexed: 11/11/2022]
Abstract
In this work, bimetallic gold and copper nanoclusters (Au-Cu NCs) were fabricated by using papain as a ligand. The as-synthesized papain-Au-Cu NCs displayed red fluorescence at 365 nm of UV lamp. The as-prepared papain-Au-Cu NCs display a strong fluorescence at 656 nm when excited at 390 nm. Papain encapsulated Au-Cu NCs exhibit distinct interaction site towards cortisone, which results red fluorescence "turn-off". Papain-Au-Cu NCs exhibited a rapid response and remarkable fluorescence quenching with the addition of cortisone as a biomarker. The developed probe is demonstrated for the quantification of cortisone by plotting the calibration graph between the fluorescence ratio (I0/I) and cortisone concentration (0.031-1.00 μM) with an impressive detection limit of 1.89 nM. Interestingly, the response of papain-Au-Cu NCs towards other biomarkers and common interfering species is quite silent, signifying the selectivity of papain-Au-Cu NCs for the detection of cortisone. The probe was successfully applied to assay cortisone biomarker in urine and plasma samples. More importantly, the analytical validation of the probe was assessed by assaying cortisone in intra- and inter-day, demonstrating papain-Au-Cu NCs could serve as promising probe for the rapid detection of cortisone in biological samples.
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Vállez-Gomis V, Carchano-Olcina S, Benedé JL, Chisvert A, Salvador A. Entrapment of magnetic nanoparticles into poly(divinylbenzene-co-N-vinylpyrrolidone) copolymer for the determination of prohibited and restricted fragrance ingredients in cosmetic products. Microchem J 2022. [DOI: 10.1016/j.microc.2022.108044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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9
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Dispersive solid-phase extraction facilitated by newly developed, fully 3D-printed device. Microchem J 2022. [DOI: 10.1016/j.microc.2022.108367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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10
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New challenges in sample preparation: Miniaturized stir bar sorptive dispersive microextraction as a high-throughput and feasible approach for low-availability sample preparation. Anal Chim Acta 2022; 1238:340627. [DOI: 10.1016/j.aca.2022.340627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 10/14/2022] [Accepted: 11/11/2022] [Indexed: 11/17/2022]
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Yang F, Dong H, Zhang F, Shao J, Wang Y, Deng H, Tang G, Zhang X, Li B, Liu S. A rapid and environmentally friendly method for determination of parabens preservatives in flavors by supercritical fluid chromatography tandem mass spectrometry. J Sep Sci 2022; 45:3043-3053. [PMID: 35621260 DOI: 10.1002/jssc.202200241] [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: 03/17/2022] [Revised: 05/07/2022] [Accepted: 05/23/2022] [Indexed: 11/09/2022]
Abstract
A rapid method for determination of parabens preservatives (methyl paraben, ethyl paraben, isopropyl paraben, propyl paraben, isobutyl paraben, and butyl paraben) in flavors was established by using supercritical fluid chromatography tandem mass spectrometry combined with dispersive solid phase extraction. After adding methanol and primary secondary amine to the sample simultaneously, high extraction efficiency and good sample cleanup could be obtained by simple shaking. Parabens were well separated on a Chiralpak IG-3 column in 6 min by gradient elution. Recoveries from spiked blank samples at 0.5, 1.0, and 5.0 mg/kg were determined to be 88.3-106.6%with relative standard deviations less than 8.0%. All analytes achieved good linear relation (r≥0.999 2). The limits of detection for all analytes ranged from 0.03 to 0.09 mg/kg and the limits of quantification from 0.11 to 0.31 mg/kg, respectively. A total of 20 actual samples were successfully analyzed by taking the proposed method. Being simple, rapid, green and reliable, this method can be taken for the determination of parabens preservatives in flavors. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Fei Yang
- China National Tobacco Quality Supervision and Test Center, Zhengzhou, 450001, China
| | - Hao Dong
- China National Tobacco Quality Supervision and Test Center, Zhengzhou, 450001, China
| | - Fengmei Zhang
- China tobacco Yunnan Industrial Co. Ltd, Kunming, 650231, China
| | - Jimin Shao
- Sichuan Tobacco Quality Supervision and Testing Station, Chengdu, 610041, China
| | - Ying Wang
- China National Tobacco Quality Supervision and Test Center, Zhengzhou, 450001, China
| | - Huimin Deng
- China National Tobacco Quality Supervision and Test Center, Zhengzhou, 450001, China
| | - Gangling Tang
- China National Tobacco Quality Supervision and Test Center, Zhengzhou, 450001, China
| | - Xiaotao Zhang
- China tobacco Guizhou Industrial Co. Ltd, Guiyang, 550009, China
| | - Bo Li
- Guangdong Tobacco Quality Supervision and Testing Station, Guangzhou, 510610, China
| | - Shanshan Liu
- China National Tobacco Quality Supervision and Test Center, Zhengzhou, 450001, China
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