Determination of Trichlorfon and Dichlorvos Residues in Shrimp Using Gas Chromatography with Nitrogen-Phosphorus Detection

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• 作者：Maureen A. Ngoh and and Richard Cullison
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：1996
• 出版时间：September 1996
• 年：1996
• 卷：44
• 期：9
• 页码：2686 - 2689
• 全文大小：98K
• 年卷期：v.44,no.9(September 1996)
• ISSN：1520-5118

文摘

A method capable of quantifying trichlorfon and dichlorvos in shrimp atconcentrations of 20-80ng/g has been developed. Ground shrimp is homogenized in ethylacetate and centrifuged. Thesupernatant is dried completely on a rotatory evaporator. Theextract is dissolved in petroleumether, concentrated on a solid phase extraction column, and analyzed bygas chromatography usinga cool on-column inlet and a nitrogen-phosphorus detector. Theanalytes are separated from matrixcomponents using a thermal gradient on a(cyanopropyl)phenyl-methylpolysiloxane column.Themethod was validated with control shrimp fortified at 20, 40, and 80ng/g trichlorfon and dichlorvos.The average recoveries and intralaboratory coefficients ofvariations were 50-83% and 15-21%respectively.Keywords: Trichlorfon; dichlorvos; shrimp; gas chromatography;nitrogen-phosphorus detector