底物固相分散法测定土壤中甲氰菊酯残留量  

A matrix solid-phase dispersion method for determination of fenpropathrin in soil

作　　者：李朝阳[1] 张智超[1] 周其林[1] 朱昌寿[1] 汪清民[1] 王琴孙[1] 

机构地区：[1]南开大学元素有机化学研究所

出　　处：《分析试验室》2003年第3期13-15,共3页Chinese Journal of Analysis Laboratory

基　　金：国家自然科学基金 ( 2 990 70 0 2 );教育部资助项目

摘　　要：以甲氰菊酯为分析对象 ,将一种新型的样品预处理技术 底物固相分散法 (MSPD)应用于测定土壤中农药残留。确定了MSPD法的实验条件 :土壤量为4g ,水的加入量为 1mL ,固相吸附剂弗罗里硅土的用量为 1 0 0g,淋洗剂为 1 5mL石油醚 乙酸乙酯 ( 1 + 9)。土壤样品在此条件下处理后无需进一步净化即可用气相色谱 电子捕获检定器测定。三种土壤的三种加标水平的回收率均在90 %以上 ,相对标准偏差小于 5 % (n =5 ) ,最小检出质量比为 0 .0 0 2mg kg。The matrix solid-phase dispersion (MSPD) method,a newly developed sample pretreatment technique, was used to analyze the pesticide(fenpropathrin) residue in soil. The MSPD condition chosen through experiments was 4 g of soil, 2 mL of added water, 10 g of florisil as solid-phase dispersion sorbent, 15 mL of ethyl acetate-petroleum ether mixture(10/90) as eluating solvent. Under the MSPD condition, no further cleanup was necessary for subsequent gas chromatographic determination with a electron-capture detector. The recoveris of fenpropathrin in three types of soil samples at different fenpropathrin levels were between 90% and 101%. The relative standard deviations were all below 5% (n=5) with a lowest detection limit of 0.002 mg/kg.

关 键 词：甲氰菊酯 农药残留量 底物固相分散法 测定 土壤 样品预处理 

分 类 号：X53[环境科学与工程—环境工程] X132