常压微波技术萃取土壤中有机氯农药

Extraction of Organochlorine Pesticides in Soils using Ordinary Pressure Microwave-assisted Extraction Technique

摘要: 利用常压微波萃取技术提取土壤样品，经佛罗里硅土柱净化后用气相色谱检测（电子捕获检测器）其中13种有机氯农药。试验了丙酮／正己烷混合溶液的提取条件，考察了提取时间、提取温度和提取功率对提取效率的影响，并与索氏提取及超声波提取进行比较。在优化的萃取条件下，常压微波萃取20min重复测定的平均回收率为84．26％-105．2％，相对标准偏差（RSD，n=5）为0．52％-18．6％。方法的检出限为0．033—0．853ng／g。

Abstract: 13 kinds of organochlorine pesticides in soils were determined by gas chromatography after extraction by an ordinary pressure microwave-assisted extraction(MAE) system.Comparing MAE with soxhlet extraction(SE) and ultrasonic-wave extraction(UE),the result