Comparison of microextraction procedures to determine pesticides in oranges by liquid chromatography-mass spectrometry.
Identifieur interne : 000E20 ( PubMed/Checkpoint ); précédent : 000E19; suivant : 000E21Comparison of microextraction procedures to determine pesticides in oranges by liquid chromatography-mass spectrometry.
Auteurs : C. Blasco [Espagne] ; G. Font ; Y. PicSource :
- Journal of chromatography. A [ 0021-9673 ] ; 2002.
English descriptors
- KwdEn :
- MESH :
- chemical , analysis : Pesticides.
- chemistry : Citrus sinensis.
- methods : Chromatography, Liquid, Mass Spectrometry.
- Reproducibility of Results, Sensitivity and Specificity.
Abstract
A liquid chromatographic-mass spectrometric method has been developed for the determination of bitertanol, carbendazim, fenthion, flusilazole, hexythiazox, imidacloprid, methidathion, methiocarb, pyriproxyfen and trichlorfon. Two procedures, based on stir bar sorptive extraction (SBSE) and matrix solid-phase dispersion (MSPD), have been evaluated for the extraction of these compounds in oranges. Their respective advantages and disadvantages are also discussed. The recoveries obtained by MSPD ranged from 47 to 96% and the relative standard deviations (RSDs) ranged from 1 to 15%, whereas with the SBSE method the recoveries were between 8 and 84% and the RSDs between 4 and 16%. Although, the limits of quantitation of most compounds are much better (0.001-0.05 mg kg(-1)) by SBSE, it is not suitable to determine some polar pesticides as carbendazim, imidacloprid and trichlorfon. Results obtained by both methods were compared, in terms of sensitivity and selectivity, with a classical ethyl acetate extraction method, and the three methods were applied to analyze real samples. As MSPD is easier to perform, faster than the organic solvent extraction, and shows equal accuracy and resolution, its application for analyzing pesticides in oranges is recommended.
PubMed: 12350094
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Blasco</name><affiliation wicri:level="1"><nlm:affiliation>Laboratori de Bromatologia i Toxicologia, Facultat de Farmàcia, Universitat de Valencia, Burjassot, Spain.</nlm:affiliation><country xml:lang="fr">Espagne</country><wicri:regionArea>Laboratori de Bromatologia i Toxicologia, Facultat de Farmàcia, Universitat de Valencia, Burjassot</wicri:regionArea><wicri:noRegion>Burjassot</wicri:noRegion></affiliation></author><author><name sortKey="Font, G" sort="Font, G" uniqKey="Font G" first="G" last="Font">G. Font</name></author><author><name sortKey="Pic, Y" sort="Pic, Y" uniqKey="Pic Y" first="Y" last="Pic">Y. Pic</name></author></analytic><series><title level="j">Journal of chromatography. 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Two procedures, based on stir bar sorptive extraction (SBSE) and matrix solid-phase dispersion (MSPD), have been evaluated for the extraction of these compounds in oranges. Their respective advantages and disadvantages are also discussed. The recoveries obtained by MSPD ranged from 47 to 96% and the relative standard deviations (RSDs) ranged from 1 to 15%, whereas with the SBSE method the recoveries were between 8 and 84% and the RSDs between 4 and 16%. Although, the limits of quantitation of most compounds are much better (0.001-0.05 mg kg(-1)) by SBSE, it is not suitable to determine some polar pesticides as carbendazim, imidacloprid and trichlorfon. Results obtained by both methods were compared, in terms of sensitivity and selectivity, with a classical ethyl acetate extraction method, and the three methods were applied to analyze real samples. As MSPD is easier to perform, faster than the organic solvent extraction, and shows equal accuracy and resolution, its application for analyzing pesticides in oranges is recommended.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">12350094</PMID><DateCreated><Year>2002</Year><Month>9</Month><Day>27</Day></DateCreated><DateCompleted><Year>2003</Year><Month>03</Month><Day>31</Day></DateCompleted><DateRevised><Year>2009</Year><Month>1</Month><Day>15</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0021-9673</ISSN><JournalIssue CitedMedium="Print"><Volume>970</Volume><Issue>1-2</Issue><PubDate><Year>2002</Year><Month>Sep</Month><Day>13</Day></PubDate></JournalIssue><Title>Journal of chromatography. 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Although, the limits of quantitation of most compounds are much better (0.001-0.05 mg kg(-1)) by SBSE, it is not suitable to determine some polar pesticides as carbendazim, imidacloprid and trichlorfon. Results obtained by both methods were compared, in terms of sensitivity and selectivity, with a classical ethyl acetate extraction method, and the three methods were applied to analyze real samples. 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