加速溶剂提取-气相色谱法测定土壤中3种有机磷和9种有机氯农药  

GC Determination of 3 Organophosphorus Pesticides and 9 Organochlorines Pesticides in Soil with Accelerated Solvent Extraction

作　　者：肖刚[1] 

机构地区：[1]沈阳地质矿产研究所,沈阳110032

出　　处：《理化检验（化学分册）》2012年第11期1343-1346,共4页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：国土资源部地质大调查项目资助(1212010913004)

摘　　要：提出了气相色谱法测定土壤中3种有机磷和9种有机氯农药含量的方法。样品经粉碎后用正己烷-丙酮(1+1)混合溶剂经加速溶剂萃取仪在60℃静态萃取10min。采用Rtx-1701色谱柱分离,火焰光度检测器测定3种有机磷农药;采用Rtx-CLPⅡ色谱柱分离,电子捕获检测器测定9种有机氯农药。12种有机农药的质量浓度均在5.0～80μg·L-1范围内呈线性,方法的检出限(3s)在0.02～0.40μg·kg-1之间。以空白石英砂样品为基体,进行加标回收试验,回收率在78.5%～108%之间,相对标准偏差(n=7)在4.2%～9.9%之间。The contents of 3 organophosphorus pesticides and 9 organochlorines pesticides in soil were determined by GC. The sample was crushed and extracted statically with mixed solvent of n-hexane and acetone （1＋1） at 60℃ for 10 min. The Rtx-1701 column and flame photometric detector were used for separation of the 3 organophosphorus pesticides and Rtx-CLP Ⅱ column and electron capture detector were used for separation of the 9 organochlorines pesticides. Linearity ranges for 12 organic pesticides were obtained between 5. 0 and 80 μg·L-1 with detection limits （3s） in the range of 0. 02-0.40kg·L-1. Using blank sample of quartz sand as matrix, test for recovery was made by standard addition method, and values of recovery obtained were in the range of 78. 5%- 108%, with values of RSD＇s （n=7） in the range of 4. 20%-9.9%.

关 键 词：加速溶剂提取 气相色谱法 有机磷农药 有机氯农药 

分 类 号：O657.7[理学—分析化学]