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Analysis of Multiclass Pesticide Residues in Tobacco by Gas Chromatography Quadrupole Time-of-Flight Mass Spectrometry Combined with Mini Solid-Phase Extraction. SEPARATIONS 2022. [DOI: 10.3390/separations9050104] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
A screening method using gas chromatography quadrupole time-of-flight mass spectrometry (GC-QTOF/MS) combined with mini solid-phase extraction (mini-SPE) was established for the quantification and validation of multiclass pesticide residues in tobacco. The method was quicker and easier, with sample purity higher than that obtained by traditional SPE and dispersed-SPE. Box-Behnken design, an experimental design for response-surface methodology, was used to optimize the variables affecting the target pesticide recovery. Under the optimized conditions, 92% of the pesticides showed satisfactory recoveries of 70%–120% with precision <20% at spiking levels of 50, 250, and 500 ng/g. The limits of detection and quantification for all the analyses were 0.05–29.9 ng/g and 0.20–98.8 ng/g, respectively. In addition, a screening method based on the retention time and a homebuilt high-resolution mass spectrometry database were established. Under the proposed screening parameters and at spiking levels of 50, 100, and 500 ng/g, 76.6%, 94.7%, and 99.0% multiclass pesticide residues were detected, respectively, using the workflow software. The validated method was successfully applied to the analysis of real tobacco samples. Thus, the combination of mini-SPE and GC-QTOF/MS serves as a suitable method for the quantitative analysis and rapid screening of multiclass pesticide residues in tobacco.
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Simultaneous Determination of Pyridate, Quizalofop-ethyl, and Cyhalofop-butyl Residues in Agricultural Products Using Liquid Chromatography-Tandem Mass Spectrometry. Foods 2022; 11:foods11070899. [PMID: 35406986 PMCID: PMC8998043 DOI: 10.3390/foods11070899] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 03/17/2022] [Accepted: 03/17/2022] [Indexed: 11/30/2022] Open
Abstract
An analytical method was developed to simultaneously determine pyridate, quizalofop-ethyl, and cyhalofop-butyl in brown rice, soybean, potato, pepper, and mandarin using LC-MS/MS. Purification was optimized using various sorbents: primary−secondary amine, octadecyl (C18) silica gel, graphitized carbon black, zirconium dioxide-modified silica particles, zirconium dioxide-modified silica particles (Z-SEP), and multi-walled carbon nanotubes (MWCNTs). Three versions of QuECHERS methods were then tested using the optimal purification agent. Finally, samples were extracted using acetonitrile and QuEChERS EN salts and purified using the Z-SEP sorbent. A six-point matrix-matched external calibration curve was constructed for the analytes. Good linearity was achieved with a determination coefficient ≥0.999. The limits of detection and quantification were 0.0075 mg/kg and 0.01 mg/kg, respectively. The method was validated after fortifying the target standards to the blank matrices at three concentration levels with five replicates for each concentration. The average recovery was within an acceptable range (70−120%), with a relative standard deviation <20%. The applicability of the developed method was evaluated with real-world market samples, all of which tested negative for these three herbicide residues. Therefore, this method can be used for the routine analysis of pyridate, quizalofop-ethyl, and cyhalofop-butyl in agricultural products.
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Shen Y, Yao X, Jin S, Yang F. Enantiomer/stereoisomer-specific residues of metalaxyl, napropamide, triticonazole, and metconazole in agricultural soils across China. ENVIRONMENTAL MONITORING AND ASSESSMENT 2021; 193:773. [PMID: 34741224 DOI: 10.1007/s10661-021-09562-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 10/26/2021] [Indexed: 06/13/2023]
Abstract
In this study, the residual status of four chiral pesticides including metalaxyl, napropamide, triticonazole, metconazole, and their enantiomers/stereoisomers were investigated in agricultural soils across China. The levels in the soils were detected as non-detected (n.d.)-16.67 ng/g for metalaxyl with a median of 0.14 ng/g; 0.004-32.99 ng/g for napropamide with a median of 0.29 ng/g; n.d.-207.39 ng/g for triticonazole with a median of 1.29 ng/g; and n.d.-71.83 ng/g for metconazole with a median of 1.03 ng/g, respectively. Enantiomer/stereoisomer-specific residues were observed for metalaxyl and triticonazole. R-Metalaxyl and R-triticonazole were identified as the major enantiomers in the soils for the two pesticides. There was no obvious enantioselective residue for napropamide in most of the soils. As for metconazole, metconazole-1 and metconazole-4 were identified as the major stereoisomers in the soils. These results suggest that enantiomer/stereoisomer-specific risk should be considered when assessing the ecological safety of these pesticides in soils.
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Affiliation(s)
- Yi Shen
- MOE Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, No. 866, Yuhangtang Road, Hangzhou, 310058, China
| | - Xiaoshan Yao
- Key Laboratory of Analytical Chemistry of the State Affairs Commission, College of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan, 430074, China
| | - Shiwei Jin
- Key Laboratory of Analytical Chemistry of the State Affairs Commission, College of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan, 430074, China
| | - Fangxing Yang
- MOE Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, No. 866, Yuhangtang Road, Hangzhou, 310058, China.
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4
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Application of Chiral and Achiral Supercritical Fluid Chromatography in Pesticide Analysis: A Review. J Chromatogr A 2020; 1634:461684. [DOI: 10.1016/j.chroma.2020.461684] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 10/28/2020] [Accepted: 11/01/2020] [Indexed: 12/13/2022]
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5
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Chang X, Sun P, Ma Y, Han D, Zhao Y, Bai Y, Zhang D, Yang L. A New Method for Determination of Thymol and Carvacrol in Thymi herba by Ultraperformance Convergence Chromatography (UPC 2). Molecules 2020; 25:E502. [PMID: 31979387 PMCID: PMC7037148 DOI: 10.3390/molecules25030502] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 01/15/2020] [Accepted: 01/21/2020] [Indexed: 11/17/2022] Open
Abstract
Ultraperformance convergence chromatography is an environmentally friendly analytical technique for dramatically reducing the use of organic solvents compared to conventional chromatographic methods. In this study, a rapid and sensitive ultraperformance convergence chromatography method was firstly established for quantification of thymol and carvacrol, two positional isomers of a major bioactive in the volatile oil of Thymi herba, the dried leaves and flowers of Thymus mongolicus or Thymus przewalskii, known in China as "Dijiao." Using a TrefoilTM CEL1 column, thymol and carvacrol were separated in less than 2.5 min and resolution was enhanced. The method was validated with respect to precision, accuracy, and linearity according to the National Medical Products Administration guidelines. The optimized method exhibited good linear correlation (r = 0.9998-0.9999), excellent precision (relative standard deviations (RSDs) < 1.50%), and acceptable recoveries (87.29-102.89%). The limits of detection for thymol and carvacrol were 1.31 and 1.57 ng/L, respectively, while their corresponding limits of quantification were 2.63 and 3.14 ng/L. Finally, the quantities of the two compounds present in 16 T. mongolicus and four T. przewalskii samples were successfully evaluated by employing the developed method. It is hoped that the results of this study will serve as a guideline for the quality control of Thymi herba.
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Affiliation(s)
- Xiaoqiang Chang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China; (X.C.); (P.S.); (Y.M.); (D.H.); (Y.Z.); (Y.B.)
- Artemisinin Research Center, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Peng Sun
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China; (X.C.); (P.S.); (Y.M.); (D.H.); (Y.Z.); (Y.B.)
- Artemisinin Research Center, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Yue Ma
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China; (X.C.); (P.S.); (Y.M.); (D.H.); (Y.Z.); (Y.B.)
- Artemisinin Research Center, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Dongchen Han
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China; (X.C.); (P.S.); (Y.M.); (D.H.); (Y.Z.); (Y.B.)
- Artemisinin Research Center, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Yifan Zhao
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China; (X.C.); (P.S.); (Y.M.); (D.H.); (Y.Z.); (Y.B.)
- Artemisinin Research Center, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Yue Bai
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China; (X.C.); (P.S.); (Y.M.); (D.H.); (Y.Z.); (Y.B.)
- Artemisinin Research Center, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Dong Zhang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China; (X.C.); (P.S.); (Y.M.); (D.H.); (Y.Z.); (Y.B.)
- Artemisinin Research Center, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Lan Yang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China; (X.C.); (P.S.); (Y.M.); (D.H.); (Y.Z.); (Y.B.)
- Artemisinin Research Center, China Academy of Chinese Medical Sciences, Beijing 100700, China
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6
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Deng H, Tang G, Fan Z, Liu S, Li Z, Wang Y, Bian Z, Shen W, Tang S, Yang F. Use of autoclave extraction-supercritical fluid chromatography/tandem mass spectrometry to analyze 4-(methylintrosamino)-1-(3-pyridyl)-1-butanone and N'-nitrosonornicotine in tobacco. J Chromatogr A 2019; 1595:207-214. [PMID: 30827697 DOI: 10.1016/j.chroma.2019.02.053] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 02/19/2019] [Accepted: 02/22/2019] [Indexed: 01/21/2023]
Abstract
4-(methylintrosamino)-1-(3-pyridyl)-1-butanone (NNK) and N'-nitrosonornicotine (NNN) are the most prevalent and toxic tobacco specific nitrosamines (TSNAs). Due to their carcinogenicity, knowledge of the composition of NNK and NNN in tobacco is necessary. Herein, a sensitive and rapid method, which employs autoclave extraction-supercritical fluid chromatography/tandem mass spectrometry (SFC-MS/MS), has been developed for the analysis of NNK and NNN in tobacco. Both water-soluble and matrix-bound NNK and NNN were extracted with 100 mM ammonium acetate in an autoclave (130 °C, 4 h), and the aqueous extract was subjected to solvent replacement prior to SFC-MS/MS analysis. NNK and NNN were effectively separated within 5 min by using supercritical CO2 as the main mobile phase coupled with a co-solvent of methanol. Excellent linearity was obtained with coefficients of determination (R2) greater than 0.9997 in the range of 1-160 ng/mL and 5-800 ng/mL for NNK and NNN, respectively. The recoveries were in the range of 92.5-110.0% at different spiked levels of real samples. 12 tobacco samples which include 3 typical tobacco varieties of burley, flue-cured, and oriental tobaccos had been analyzed, and the fraction of matrix-bound NNK was determined as well. In addition, a comparison between the proposed SFC-MS/MS method and a validated liquid chromatography tandem mass spectrometry (LC-MS/MS) internal standard method was conducted. Both techniques exhibit comparable analysis results, but peak splitting of NNN was observed by LC-MSMS due to the existence of E/Z isomers, while SFC-MS/MS offers great improvement through elution condition optimization, demonstrating the applicability of SFC-MS/MS as an alternative tool for NNK and NNN analysis.
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Affiliation(s)
- Huimin Deng
- China National Tobacco Quality Supervision and Test Center, No.2 Fengyang Street, High and New Technology Industries Development Zone, Zhengzhou, 450001, China
| | - Gangling Tang
- China National Tobacco Quality Supervision and Test Center, No.2 Fengyang Street, High and New Technology Industries Development Zone, Zhengzhou, 450001, China
| | - Ziyan Fan
- China National Tobacco Quality Supervision and Test Center, No.2 Fengyang Street, High and New Technology Industries Development Zone, Zhengzhou, 450001, China
| | - Shanshan Liu
- China National Tobacco Quality Supervision and Test Center, No.2 Fengyang Street, High and New Technology Industries Development Zone, Zhengzhou, 450001, China
| | - Zhonghao Li
- China National Tobacco Quality Supervision and Test Center, No.2 Fengyang Street, High and New Technology Industries Development Zone, Zhengzhou, 450001, China
| | - Ying Wang
- China National Tobacco Quality Supervision and Test Center, No.2 Fengyang Street, High and New Technology Industries Development Zone, Zhengzhou, 450001, China
| | - Zhaoyang Bian
- China National Tobacco Quality Supervision and Test Center, No.2 Fengyang Street, High and New Technology Industries Development Zone, Zhengzhou, 450001, China
| | - Wei Shen
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, Jiangsu Province, China
| | - Sheng Tang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, Jiangsu Province, China.
| | - Fei Yang
- China National Tobacco Quality Supervision and Test Center, No.2 Fengyang Street, High and New Technology Industries Development Zone, Zhengzhou, 450001, China.
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7
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Hernández-Valencia CG, Román-Guerrero A, Aguilar-Santamaría Á, Cira L, Shirai K. Cross-Linking Chitosan into Hydroxypropylmethylcellulose for the Preparation of Neem Oil Coating for Postharvest Storage of Pitaya ( Stenocereus pruinosus). Molecules 2019; 24:molecules24020219. [PMID: 30634411 PMCID: PMC6358988 DOI: 10.3390/molecules24020219] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 12/28/2018] [Accepted: 01/02/2019] [Indexed: 11/16/2022] Open
Abstract
The market trend for pitaya is increasing, although the preservation of the quality of this fruit after the harvest is challenging due to microbial decay, dehydration, and oxidation. In this work, the application of antimicrobial chitosan-based coatings achieved successful postharvest preservation of pitaya (Stenocereus pruinosus) during storage at 10 ± 2 °C with a relative humidity of 80 ± 5%. The solution of cross-linked chitosan with hydroxypropylmethylcellulose with entrapped Neem oil (16 g·L-1) displayed the best postharvest fruit characteristics. The reduction of physiological weight loss and fungal contamination, with an increased redness index and release of azadirachtin from the microencapsulated oil, resulted in up to a 15 day shelf life for this fruit. This postharvest procedure has the potential to increase commercial exploitation of fresh pitaya, owing to its good taste and high content of antioxidants.
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Affiliation(s)
- Carmen G Hernández-Valencia
- Laboratory of Biopolymers and Pilot Plant of Bioprocessing of Agro-Industrial and Food By-Products, Biotechnology Department, Universidad Autonoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco No. 186, Iztapalapa, 09340 Mexico City, Mexico.
| | - Angélica Román-Guerrero
- Laboratory of Biopolymers and Pilot Plant of Bioprocessing of Agro-Industrial and Food By-Products, Biotechnology Department, Universidad Autonoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco No. 186, Iztapalapa, 09340 Mexico City, Mexico.
| | - Ángeles Aguilar-Santamaría
- Laboratory of Biopolymers and Pilot Plant of Bioprocessing of Agro-Industrial and Food By-Products, Biotechnology Department, Universidad Autonoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco No. 186, Iztapalapa, 09340 Mexico City, Mexico.
| | - Luis Cira
- Biotechnology and Food Science Department, Instituto Tecnologico de Sonora, 5 de febrero No. 818 sur, 85000 Obregon City, Sonora, Mexico.
| | - Keiko Shirai
- Laboratory of Biopolymers and Pilot Plant of Bioprocessing of Agro-Industrial and Food By-Products, Biotechnology Department, Universidad Autonoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco No. 186, Iztapalapa, 09340 Mexico City, Mexico.
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8
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Zhang X, Zhao Y, Cui X, Wang X, Shen H, Chen Z, Huang C, Meruva N, Zhou L, Wang F, Wu L, Luo F. Application and enantiomeric residue determination of diniconazole in tea and grape and apple by supercritical fluid chromatography coupled with quadrupole-time-of-flight mass spectrometry. J Chromatogr A 2018; 1581-1582:144-155. [DOI: 10.1016/j.chroma.2018.10.051] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Accepted: 10/29/2018] [Indexed: 01/30/2023]
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9
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Deng H, Yang F, Li Z, Bian Z, Fan Z, Wang Y, Liu S, Tang G. Rapid determination of 9 aromatic amines in mainstream cigarette smoke by modified dispersive liquid liquid microextraction and ultraperformance convergence chromatography tandem mass spectrometry. J Chromatogr A 2017; 1507:37-44. [PMID: 28583391 DOI: 10.1016/j.chroma.2017.05.056] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 05/23/2017] [Accepted: 05/24/2017] [Indexed: 12/17/2022]
Abstract
Aromatic amines in mainstream cigarette smoke have long been monitored due to their carcinogenic toxicity. In this work, a reliable and rapid method was developed for the simultaneous determination of 9 aromatic amines in mainstream cigarette smoke by modified dispersive liquid liquid microextraction (DLLME) and ultraperformance convergence chromatography tandem mass spectrometry (UPC2-MS/MS). Briefly, the particulate phase of the cigarette smoke was captured by a Cambridge filter pad, and diluted hydrogen chloride aqueous solution is employed to extract the aromatic amines under mechanical shaking. After alkalization with sodium hydroxide solution, small amount of toluene was introduced to further extract and enrich aromatic amines by modified DLLME under vortexing. After centrifugation, toluene phase was purified by a universal QuEChERS cleanup kit and was finally analyzed by UPC2-MS/MS. Attributing to the superior performance of UPC2-MS/MS, this novel approach allowed the separation and determination of 9 aromatic amines within 5.0min with satisfactory resolution and sensitivity. The proposed method was finally validated using Kentucky reference cigarette 3R4F, and emission levels of targeted aromatic amines determined were comparable to previously reported methods At three different spiked levels, the recoveries of most analytes were ranged from 74.01% to 120.50% with relative standard deviation (RSD) less than 12%, except that the recovery of p-toluidine at low spiked level and 3-aminobiphenyl at medium spiked level was 62.77% and 69.37% respectively. Thus, this work provides a novel alternative method for the simultaneous analysis of 9 aromatic amines in mainstream cigarette smoke.
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Affiliation(s)
- Huimin Deng
- China National Tobacco Quality Supervision and Test Center, No. 2 Fengyang Street, High and New Technology Industries Development Zone, Zhengzhou 450001, China
| | - Fei Yang
- China National Tobacco Quality Supervision and Test Center, No. 2 Fengyang Street, High and New Technology Industries Development Zone, Zhengzhou 450001, China
| | - Zhonghao Li
- China National Tobacco Quality Supervision and Test Center, No. 2 Fengyang Street, High and New Technology Industries Development Zone, Zhengzhou 450001, China
| | - Zhaoyang Bian
- China National Tobacco Quality Supervision and Test Center, No. 2 Fengyang Street, High and New Technology Industries Development Zone, Zhengzhou 450001, China
| | - Ziyan Fan
- China National Tobacco Quality Supervision and Test Center, No. 2 Fengyang Street, High and New Technology Industries Development Zone, Zhengzhou 450001, China
| | - Ying Wang
- China National Tobacco Quality Supervision and Test Center, No. 2 Fengyang Street, High and New Technology Industries Development Zone, Zhengzhou 450001, China
| | - Shanshan Liu
- China National Tobacco Quality Supervision and Test Center, No. 2 Fengyang Street, High and New Technology Industries Development Zone, Zhengzhou 450001, China
| | - Gangling Tang
- China National Tobacco Quality Supervision and Test Center, No. 2 Fengyang Street, High and New Technology Industries Development Zone, Zhengzhou 450001, China.
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Cao J, Sun N, Yu W, Pang X, Lin Y, Kong F, Qiu J. Multiresidue determination of 114 multiclass pesticides in flue-cured tobacco by solid-phase extraction coupled with gas chromatography and tandem mass spectrometry. J Sep Sci 2016; 39:4629-4636. [PMID: 27753227 DOI: 10.1002/jssc.201600914] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 10/06/2016] [Accepted: 10/08/2016] [Indexed: 11/12/2022]
Abstract
A sensitive and robust multiresidue method for the simultaneous analysis of 114 pesticides in tobacco was developed based on solid-phase extraction coupled with gas chromatography and tandem mass spectrometry. In this strategy, tobacco samples were extracted with acetonitrile and cleaned up with a multilayer solid-phase extraction cartridge Cleanert TPT using acetonitrile/toluene (3:1) as the elution solvent. Two internal standards of different polarity were used to meet simultaneous pesticides quantification demands in the tobacco matrix. Satisfactory linearity in the range of 10-500 ng/mL was obtained for all 114 pesticides with linear regression coefficients higher than 0.994. The limit of detection and limit of quantification values were 0.02-5.27 and 0.06-17.6 ng/g, respectively. For most of the pesticides, acceptable recoveries in the range of 70-120% and repeatabilities (relative standard deviation) of <11% were achieved at spiking levels of 20, 100, and 400 ng/g. Compared with the reported multiresidue analytical method, the proposed method provided a cleaner test solution with smaller amounts of pigments, fatty acids as well as other undesirable interferences. The development and validation of the high sensitivity, high selectivity, easy automation, and high-throughput analytical method meant that it could be successfully used for the determination of pesticides in tobacco samples.
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Affiliation(s)
- Jianmin Cao
- Laboratory of Quality & Safety Risk Assessment for Tobacco, Ministry of Agriculture, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Na Sun
- Laboratory of Quality & Safety Risk Assessment for Tobacco, Ministry of Agriculture, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Weisong Yu
- Laboratory of Quality & Safety Risk Assessment for Tobacco, Ministry of Agriculture, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Xueli Pang
- Laboratory of Quality & Safety Risk Assessment for Tobacco, Ministry of Agriculture, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Yingnan Lin
- Laboratory of Quality & Safety Risk Assessment for Tobacco, Ministry of Agriculture, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Fanyu Kong
- Laboratory of Quality & Safety Risk Assessment for Tobacco, Ministry of Agriculture, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Jun Qiu
- Laboratory of Quality & Safety Risk Assessment for Tobacco, Ministry of Agriculture, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, China
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11
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Liu H, Gan N, Chen Y, Ding Q, Huang J, Lin S, Cao Y, Li T. Novel method for the rapid and specific extraction of multiple β
2
‐agonist residues in food by tailor‐made Monolith‐MIPs extraction disks and detection by gas chromatography with mass spectrometry. J Sep Sci 2016; 39:3578-85. [DOI: 10.1002/jssc.201600479] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 06/18/2016] [Accepted: 07/13/2016] [Indexed: 01/08/2023]
Affiliation(s)
- Haibo Liu
- Faculty of Materials Science and Chemical EngineeringNingbo University Ningbo China
| | - Ning Gan
- Faculty of Materials Science and Chemical EngineeringNingbo University Ningbo China
| | - Yinji Chen
- Department of Food Science and Engineering/Collaborative Innovation Center for Modern Grain Circulation and SafetyNanjing University of Finance and Economics Nanjing China
| | - Qingqing Ding
- Faculty of Materials Science and Chemical EngineeringNingbo University Ningbo China
| | - Jie Huang
- Faculty of Marine ScienceNingbo University Ningbo China
| | - Saichai Lin
- Faculty of Materials Science and Chemical EngineeringNingbo University Ningbo China
| | - Yuting Cao
- Faculty of Materials Science and Chemical EngineeringNingbo University Ningbo China
| | - Tianhua Li
- Faculty of Materials Science and Chemical EngineeringNingbo University Ningbo China
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12
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Zhang Y, Xiao Z, Lv S, Du Z, Liu X. Simultaneous determination of 16 polycyclic aromatic hydrocarbons in reclaimed water using solid-phase extraction followed by ultra-performance convergence chromatography with photodiode array detection. J Sep Sci 2016; 39:993-9. [PMID: 26663357 DOI: 10.1002/jssc.201500823] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Revised: 11/28/2015] [Accepted: 12/01/2015] [Indexed: 11/07/2022]
Abstract
A new fast and effective analysis method has been developed to simultaneously determine 16 polycyclic aromatic hydrocarbons in reclaimed water samples by ultra-performance convergence chromatography with photodiode array detection and solid-phase extraction. The parameters of ultra-performance convergence chromatography on the separation behaviors and the crucial condition of solid-phase extraction were investigated systematically. Under optimal conditions, the 16 polycyclic aromatic hydrocarbons could be separated within 4 min. The limits of detection and quantification were in the range of 0.4-4 and 1-10 μg/L in water, respectively. This approach has been applied to a real industrial wastewater treatment plant successfully. The results showed that polycyclic aromatic hydrocarbons were dramatically decreased after chemical treatment procedure, and the oxidation procedure was effective to remove trace polycyclic aromatic hydrocarbons.
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Affiliation(s)
- Yun Zhang
- College of Science, Beijing University of Chemical Technology, Beijing, China
| | - Zhiyong Xiao
- Beijing Agro-Monitoring Station, Beijing, China
- Laboratory of Quality & Safety Risk Assessment for Agro-products on Environmental Factors, Beijing, MOA, China
| | - Surong Lv
- College of Science, Beijing University of Chemical Technology, Beijing, China
| | - Zhenxia Du
- College of Science, Beijing University of Chemical Technology, Beijing, China
- Beijing Key Laboratory of Environmentally Harmful Chemical Analysis, Beijing University of Chemical Technology, Beijing, China
| | - Xiaoxia Liu
- Beijing Agro-Monitoring Station, Beijing, China
- Laboratory of Quality & Safety Risk Assessment for Agro-products on Environmental Factors, Beijing, MOA, China
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13
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Han Y, Zou N, Song L, Li Y, Qin Y, Liu S, Li X, Pan C. Simultaneous determination of 70 pesticide residues in leek, leaf lettuce and garland chrysanthemum using modified QuEChERS method with multi-walled carbon nanotubes as reversed-dispersive solid-phase extraction materials. J Chromatogr B Analyt Technol Biomed Life Sci 2015; 1005:56-64. [DOI: 10.1016/j.jchromb.2015.10.002] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Revised: 08/14/2015] [Accepted: 10/05/2015] [Indexed: 11/15/2022]
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Song W, Qiao X, Liang WF, Ji S, Yang L, Wang Y, Xu YW, Yang Y, Guo DA, Ye M. Efficient separation of curcumin, demethoxycurcumin, and bisdemethoxycurcumin from turmeric using supercritical fluid chromatography: From analytical to preparative scale. J Sep Sci 2015; 38:3450-3. [PMID: 26256681 DOI: 10.1002/jssc.201500686] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Revised: 07/18/2015] [Accepted: 07/21/2015] [Indexed: 12/16/2022]
Abstract
Curcumin is the major constituent of turmeric (Curcuma longa L.). It has attracted widespread attention for its anticancer and anti-inflammatory activities. The separation of curcumin and its two close analogs, demethoxycurcumin and bisdemethoxycurcumin, has been challenging by conventional techniques. In this study, an environmentally friendly method based on supercritical fluid chromatography was established for the rapid and facile separation of the three curcuminoids directly from the methanol extract of turmeric. The method was first developed and optimized by ultra performance convergence chromatography, and was then scaled up to preparative supercritical fluid chromatography. Eluted with supercritical fluid CO2 containing 8-15% methanol (containing 10 mM oxalic acid) at a flow rate of 80 mL/min, curcumin, demethoxycurcumin and bisdemethoxycurcumin could be well separated on a Viridis BEH OBD column (Waters, 250 mm × 19 mm, 5 μm) within 6.5 min. As a result, 20.8 mg of curcumin (97.9% purity), 7.0 mg of demethoxycurcumin (91.1%), and 4.6 mg of bisdemethoxycurcumin (94.8%) were obtained after a single step of supercritical fluid chromatography separation with a mean recovery of 76.6%. Showing obvious advantages in low solvent consumption, large sample loading, and easy solvent removal, supercritical fluid chromatography was proved to be a superior technique for the efficient separation of natural products.
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Affiliation(s)
- Wei Song
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, China
| | - Xue Qiao
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, China
| | - Wen-fei Liang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, China
| | - Shuai Ji
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, China
| | - Lu Yang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, China
| | - Yuan Wang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, China
| | - Yong-wei Xu
- Waters Corporation, Pudong New District, Shanghai, China
| | - Ying Yang
- Waters Corporation, Pudong New District, Shanghai, China
| | - De-an Guo
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, China.,State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Min Ye
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, China.,State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
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Yu F, Chen L, Pan L, Hu B, Liu H. Determination of multi-pesticide residue in tobacco using multi-walled carbon nanotubes as a reversed-dispersive solid-phase extraction sorbent. J Sep Sci 2015; 38:1894-9. [DOI: 10.1002/jssc.201500148] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Revised: 03/23/2015] [Accepted: 03/24/2015] [Indexed: 11/08/2022]
Affiliation(s)
- Fei Yu
- Zhengzhou Tobacco Research Institute of CNTC; Zhengzhou China
| | - Li Chen
- Zhengzhou Tobacco Research Institute of CNTC; Zhengzhou China
| | - Lining Pan
- Zhengzhou Tobacco Research Institute of CNTC; Zhengzhou China
| | - Bin Hu
- Zhengzhou Tobacco Research Institute of CNTC; Zhengzhou China
| | - Huimin Liu
- Zhengzhou Tobacco Research Institute of CNTC; Zhengzhou China
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