Immunochemical Screening of Pesticides (Simazine and Cypermethrin) in Orange Oil
Identifieur interne : 000A15 ( Ncbi/Checkpoint ); précédent : 000A14; suivant : 000A16Immunochemical Screening of Pesticides (Simazine and Cypermethrin) in Orange Oil
Auteurs : Mikaela Nichkova [États-Unis] ; Xun Fu [États-Unis] ; Zheng Yang [États-Unis] ; Ping Zhong [États-Unis] ; James R. Sanborn [États-Unis] ; Dan Chang [États-Unis] ; Shirley J. Gee [États-Unis] ; Bruce D. Hammock [États-Unis]Source :
- Journal of agricultural and food chemistry [ 0021-8561 ] ; 2009.
Abstract
Pesticide residue analysis in citrus oils is very important for their quality and marketing. This study assessed the reliability and sensitivity of enzyme-linked immunosorbent assays (ELISA) for simazine and cypermethrin screening in orange oil. Simazine was analyzed after extraction of the oil with methanolic phosphate buffer with a limit of quantitation (LOQ) of 40 µg/L for 1-fold and ~100 µg/L for 10-fold oils. Due to matrix effects the immunoanalysis of cypermethrin required hexane–acetonitrile partitioning followed by silica solid phase extraction. The method detected levels higher than 0.5 ppm (mg/L). This LOQ is lower than the U.S. EPA tolerance level (0.9 ppm) for cypermethrin in citrus oils. A good correlation (
Url:
DOI: 10.1021/jf900652a
PubMed: 19526986
PubMed Central: 3033343
Affiliations:
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<author><name sortKey="Nichkova, Mikaela" sort="Nichkova, Mikaela" uniqKey="Nichkova M" first="Mikaela" last="Nichkova">Mikaela Nichkova</name>
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<front><div type="abstract" xml:lang="en"><p id="P2">Pesticide residue analysis in citrus oils is very important for their quality and marketing. This study assessed the reliability and sensitivity of enzyme-linked immunosorbent assays (ELISA) for simazine and cypermethrin screening in orange oil. Simazine was analyzed after extraction of the oil with methanolic phosphate buffer with a limit of quantitation (LOQ) of 40 µg/L for 1-fold and ~100 µg/L for 10-fold oils. Due to matrix effects the immunoanalysis of cypermethrin required hexane–acetonitrile partitioning followed by silica solid phase extraction. The method detected levels higher than 0.5 ppm (mg/L). This LOQ is lower than the U.S. EPA tolerance level (0.9 ppm) for cypermethrin in citrus oils. A good correlation (<italic>r</italic>
<sup>2</sup>
0.99) between ELISA and LC-MS/MS was observed for the analysis of both analytes in 1-fold orange oil. Immunochemical screening can be used to reduce instrumental analysis costs by its use in preliminary orange oil screening.</p>
</div>
</front>
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<name sortKey="Chang, Dan" sort="Chang, Dan" uniqKey="Chang D" first="Dan" last="Chang">Dan Chang</name>
<name sortKey="Fu, Xun" sort="Fu, Xun" uniqKey="Fu X" first="Xun" last="Fu">Xun Fu</name>
<name sortKey="Gee, Shirley J" sort="Gee, Shirley J" uniqKey="Gee S" first="Shirley J." last="Gee">Shirley J. Gee</name>
<name sortKey="Hammock, Bruce D" sort="Hammock, Bruce D" uniqKey="Hammock B" first="Bruce D." last="Hammock">Bruce D. Hammock</name>
<name sortKey="Sanborn, James R" sort="Sanborn, James R" uniqKey="Sanborn J" first="James R." last="Sanborn">James R. Sanborn</name>
<name sortKey="Yang, Zheng" sort="Yang, Zheng" uniqKey="Yang Z" first="Zheng" last="Yang">Zheng Yang</name>
<name sortKey="Zhong, Ping" sort="Zhong, Ping" uniqKey="Zhong P" first="Ping" last="Zhong">Ping Zhong</name>
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