气相色谱法测定土壤和作物中精稳杀得及稳杀得残留量

Determination of diclofop-methyl and diclofop residues in soil and crops by gas chromatography.

作者信息

Liu W P, Chen Z W, Xu H Q, Shi Y Y, Chen Y Z

机构信息

Department of Chemistry, Zhejiang University, Hangzhou, China.

出版信息

J Chromatogr. 1991 Jun 28;547(1-2):509-15. doi: 10.1016/s0021-9673(01)88681-7.

DOI:10.1016/s0021-9673(01)88681-7

PMID:1894728

Abstract

A method is described for the determination of residues of the herbicide diclofop-methyl and its metabolite, diclofop, in soil and crops. The residues were extracted with acetone-light petroleum and extracts were concentrated (diclofop was derivatized to its pentafluorobenzyl derivative), and then the products were purified on a chromatographic column containing alumina, silver-alumina and Florisil. Finally, they were determined by gas chromatography using an electron-capture detector. The detection limits of diclofop-methyl and diclofop were between 0.01 and 0.05 mg/kg. The average recoveries were 76.4-97.2% and 72.8-105.2%, respectively, making the method suitable for statutory residue testing purposes.

摘要

本文描述了一种测定土壤和作物中除草剂精稳杀得及其代谢物稳杀得残留量的方法。残留量用丙酮 - 轻质石油醚提取，提取物浓缩（稳杀得衍生化为其五氟苄基衍生物），然后在含有氧化铝、银 - 氧化铝和弗罗里硅土的色谱柱上进行纯化。最后，使用电子捕获检测器通过气相色谱法进行测定。精稳杀得和稳杀得的检测限在0.01至0.05mg/kg之间。平均回收率分别为76.4 - 97.2%和72.8 - 105.2%，该方法适用于法定残留检测目的。