分散液液微萃取-分光光度法测定环境水样中孔雀石绿

建立了简便、快速、有效的分散液液微萃取-分光光度法测定环境水样中孔雀石绿的分析方法。对萃取剂、分散剂的种类和体积、萃取时间、离心时间、盐浓度等影响萃取效率的因素进行了优化。在优化的萃取条件下,方法的线性范围为8—1000μg/L（r=0.9992）,相对标准偏差（RSD）为4.1%（C=100μg/L,n=6）,检出限为4.20μg/L。对3种实际水样中的孔雀石绿进行测定,加标回收率在74.7%—108.2%之间（n=5）。方法适用于环境水样中的痕量孔雀石绿的检测。

Determination of Malachite Green in Environmental Water Samples by Spectrophotometry with Dispersive Liquid-Liquid Microextraction

A simple,rapid and effective method,the spectrophotometry with dispersive liquid-liquid microextraction（DLLME-UV-Vis） was developed for the extraction and determination of malachite green in environmental water samples.The factors relevant to the microextraction efficiency,such as the type and volume of dispersion agent and extraction solvents,extraction time and so on were optimized.Under the optimized extraction conditions,the linear response of the method was in the range of 8—1000μg/L（r=0.9992）,and the relative standard deviation（RSD） for 100μg/L of malachite green was 4.1%（n=6）.The detection limit was 4.20μg/L.The developed method was successfully applied to the determination of trace amount of malachite green in three kinds of real environmental water samples with recovery in the range of 74.7%—108.2%（n=5）.This method is suitable for the determination of trace amount of malachite green in environmental water samples.