固相萃取法测定土茯苓中4种有机磷农药残留量  

Determination of Organophosphorous Pesticides in Edible Smilax Tubers by Solid-phase Extraction

作　　者：陈慧琴[1] 焦琳娟[1] 刘丽霞[1] 

机构地区：[1]韶关学院化学与环境上程学院,广东韶关512005

出　　处：《环境科学与技术》2008年第1期77-79,共3页Environmental Science & Technology

摘　　要：文章研究了固相萃取法测定土苻苓中4种有机磷农药(敌敌畏、乐果、甲基对硫磷、对硫磷)的可行性。对影响实验结果的提取剂、洗脱剂、洗脱剂用量进行了条件优化。在优化后的实验条件下,该方法除了对乐果的线性范围在3.55～20μg/mL之间,其余三种有机磷农药线性范围均在2.5～20μg/mL之间,相关系数R为0.9991～0.9997,回收率为79.0%～109%,相对标准偏差为6.7%～8.9%。检出限分别为:敌敌畏0.25μg/mL;乐果2.85μg/mL;甲基对硫磷0.20μg/mL;对硫磷0.15μg/mL。实验结果表明,该方法操作简便省时,灵敏准确,适用于多种有机磷农药的同时分析测定。The feasibility of determining four organophosphorous pesticides including dichlorvos, dimethoate, methylparathion and parathion in edible smilax tubers by solid-phase extraction was studied. Conditions such as extractants, eluants and dosage of eluant were optimized. Under these conditions, the linear range of dichlorvos was from 3.55 - 20μg/mL, while linear ranges of the other three were all from 2.5～ 20μg/mL with relative coefficient ranging from 0.9991 to 0.9997, recovery efficiency from 79.0% - 109% and relative standard deviation of 6.7%～8.9%. The detection limit of dichlorvos, dimethoate, methylparathion and parathion was 0.25μg/mL, 2.85μg/mL, 0.20μg/mL and 0.15μg/mL respectively. Experiment results showed that the method which is simple, efficient and accurate can be used to determine manifold organophosphorous pesticides simultaneously.

关 键 词：固相萃取 土茯苓 有机磷农药 

分 类 号：X830.2[环境科学与工程—环境工程]