加速溶剂提取-气相色谱法同时测定土壤中的22种有机氯和有机磷农药  

Determination of Organochlorines and Organophosphorus in Soil by Accelerated Solvent Extraction-Gas Chromatography

作　　者：肖刚[1] 

机构地区：[1]沈阳地质矿产研究所,辽宁沈阳110032

出　　处：《岩矿测试》2012年第6期1033-1036,共4页Rock and Mineral Analysis

基　　金：中国地质大调查项目(1212010913004)

摘　　要：我国环境污染调查评价测试项目中开展了大量有关土壤中有机氯及有机磷农药残留的测定工作,多种有机污染物同时分析测试的方法是研究的新热点。本文以正己烷-丙酮(体积比1∶1)为提取剂,采用加速溶剂提取,毛细管柱气相色谱法测定土壤中六氯苯等9种有机氯及敌敌畏等13种有机磷农药残留。方法回收率为79.1%～107.7%,相对标准偏差为3.62%～9.94%(n=7),检出限为0.02～0.45μg/kg。本方法将两类农药同时提取且实现了各组分的完全分离,拓展了方法的适用范围,与传统的超声提取和索氏提取法相比,提取时间缩短至20 min,提取溶剂体积降至50 mL,缩短了分析时间,降低了成本,精密度和回收率能够满足全国环境污染调查评价的需要。A large number of measurement work on organochlorine and organophosphorus pesticide residue in soil was carried out in China＇ s environmental pollution survey evaluation and test project. The simultaneous measurements of a variety of organic pollutants were a new research hotspot. In this study, the pesticide residues of 9 kinds of organochlorine such as hexachlorobenzene and 13 kinds of organophosphorus such as diehlorvos were simultaneously measured by Gas Chromatography with n-hexane-acetone （volume ratio 1 ： 1 ） for extracting agent, the accelerated solvent extraction and capillary column. The recoveries were from 79. 1% to 107.7% , relative standard deviations were from 3.62% to 9.94% （n =7） and detection limits were from 0.02 to 0.45 p,g/kg. This method simultaneously extracted the two kinds of pesticides and completely separated the various components, which extended the application field. Comparing with the traditional ultrasonic extraction and Soxhlet extraction method, extracting time of this method was reduced to 20 rain and extraction solvent volume was down to 50 mL, which saved the analytical time and reduced the cost. Meanwhile, the precisions and recoveries met the requirements of the national environmental pollution survey and assessment.

关 键 词：土壤 有机氯农药 有机磷农药 加速溶剂提取 气相色谱法 

分 类 号：S151.93[农业科学—土壤学] S482.32[农业科学—农业基础科学]