环境水中灭多威的固相萃取和气相色谱测定

The Liquid-Solid Extraction of Methomyl in Environmental Water and Gas Chromatographic Analysis

用活性炭固相萃取环境水中微量灭多威，然后用气相色谱法直接测定，方法简便、灵敏、准确。灭多威的检测限为０．２ｎｇ。水样中的最低检出浓度为０．２μｇ／Ｌ，平均加标回收率为９５．８％－１００．７％，高、中、低３种浓度的变异系数均小于５％。

A solid-phase extraction procedure of methomyl from environmental water with active carbon cartridge for gas chromatographic analysis is presented. The detection limit and the minimum detectable concentration of methomyl in water were 0.2 ng and 0.2μg/L, respectively. The average recoveries of methomyl as added to water were in the range of 95.8-100.7%. The relative standard deviations were lower than 5%.