直接液相微萃取-高效液相色谱法测定水中速灭威残留

农药的使用对农业有重要的、不可替代的意义,然而很多农药的使用会给环境带来污染,影响人类健康.本文采用直接液相微萃取法（Dir-LPME）与高效液相色谱（HPLC）联用分析测定环境水样中的速灭威.对影响Dir-LPME的各种因素如萃取溶剂类型、萃取溶剂体积、萃取时间等条件进行了优化,并将其应用于江水、自来水和农田水中速灭威的分析检测.速灭威的萃取富集倍数为10,线性范围为0.2-2μg/mL,加标回收率在95%—105%之间,相对标准偏差低于7.4%.

Determination of Metacrate in Water Samples by Using Direct Liquid-phase Microextraction and High Performance Liquid Chromatography

It is known that pesticide is important and irreplaceable to agriculture.However,the application of pesticide will bring pollution to the environment and have impact on human health.In this study,a method based on Dir-LPME combined with high performance liquid chromatography has been developed for the determination of metacrate in water samples.This study aims to optimize the factors that influence Dir-LPME,such as extraction solvent,solvent volume,extraction time and so on,and apply the method to the analysis of the metacrate in the river water,main-water and water from farm field.Under the optimized condition,the enrichment factor of metacrate was 10,the linear range was from 0.2 g/mL to 2 g/mL,the recovery was form 95 % to 105 %,and the relative standard deviation was lower than 7.4 %.