顶空气相色谱法测定土壤中氯化苦残留  

Determination of Chloropicrin in Soil by Headspace Gas Chromatography

作　　者：汤珏婷[1,2] 王秋霞[1] 王方艳[1] 毛连刚[1] 侯明生[2] 曹坳程[1] 

机构地区：[1]中国农业科学院植物保护研究所,北京100193 [2]华中农业大学植物科技学院,武汉430070

出　　处：《农药学学报》2009年第4期511-514,共4页Chinese Journal of Pesticide Science

基　　金：农业部财政专项"甲基溴替代技术示范(2110402)";现代农业技术体系北京创新团队经费资助

摘　　要：建立了一种快速测定土壤中氯化苦残留的方法。用石油醚室温下浸提土壤30min后漩涡振荡，离心后取上清液直接采用顶空气相色谱法测定。结果显示，在质量浓度0．005～4mg／L范围内，线性相关系数R^2=0．999。氯化苦的添加水平在0．0125～1．25mg／kg范围内，5次重复的平均添加回收率在82．7％～109．9％之间，相对标准偏差（RSD）在8．4％-9．5％之间，检测限为0．0088mg／kg，定量限为0．029mg／kg。该方法可以满足土壤中氯化苦残留测定的要求。An effective and rapid analytical method for determination of chioropicrin residues in soil was developed. Chloropicrin in soil was extracted with petroleum ether by shaking for 30 min. The supernatant was transferred into a clear headspace vial after centrifugation and determined by headspace gas chromatography with ECD. The correlation coefficient at the concentration range of 0.005-4 mg/L was 0. 999. The average recoveries were 82.7% -109.9% at fortified concentration range of 0. 012 5- 1.25 mg/kg, with relative standard deviations （RSD） of 8.4%-9.5 %. The limit of detection （LOD） was 0. 008 8 mg/kg, The limit of quantitation （LOQ） was 0. 029 mg/kg. The results showed that this method can be applied to determine the residues of chloropicrin in soil.

关 键 词：氯化苦 残留 土壤 顶空气相色谱 

分 类 号：O657.71[理学—分析化学] TQ450.263[理学—化学]