气相色谱法测定土壤中的噻嗪酮  

Determination of Buprofezin in Soil by Gas Chromatography

作　　者：张仙[1] 王明明[2] 刘军[1] 陈浩[2] 沈菁[1] 

机构地区：[1]湖北省农业科学院农业质量标准与检测技术研究所,武汉430064 [2]华中农业大学理学院,武汉430070

出　　处：《湖北农业科学》2011年第22期4713-4715,4727,共4页Hubei Agricultural Sciences

基　　金：湖北省农业科技创新中心资助项目(2010-620-001-03)

摘　　要：建立了水稻田土壤中噻嗪酮的残留分析方法。土壤样品以乙腈为萃取溶剂进行超声波辅助提取,经NH2-SPE净化,乙腈-甲苯(3:1,V/V)洗脱,采用气相色谱-氮磷检测器法(GC-NPD)进行测定。对方法的准确度、精密度、灵敏度及线性范围进行了测试。在0.020～1.000 mg/L范围内,噻嗪酮的峰面积与其质量浓度呈良好的线性关系,相关系数为0.996 3。土壤样品中添加0.020～0.100 mg/kg噻嗪酮的平均回收率为87.0%～92.9%,相对标准偏差为2.3%～5.5%;方法检出限为0.002 mg/kg。该方法简单、快速、准确,适用于土壤中噻嗪酮残留的检测。An analytical method for determination of buprofezin in soil was developed.Soil samples were extracted with acetonitrile by ultrasonic-assisted extraction,cleaned up by solid phase extraction with a NH2 cartridge and eluted with acetonitrile-toluene（3∶1,V/V）,and determined by gas chromatography with nitrogen-phosphorus detector（GC-NPD）.It was demonstrated that the linearity was obtained in the concentration range of 0.020~1.000 mg/L with a correlation coefficient of 0.996 3.The average recoveries of the proposed method ranged from 87.0% to 92.9% with relative standard deviations of 2.3%～5.5% at the spiked level of 0.020～1.000 mg/kg.The limits of detection based on signal-to-noise ratio（S/N） of 3 times was 0.002 mg/kg.The proposed method is simple,rapid and accurate and suitable for detecting buprofezin in soil.

关 键 词：气相色谱法 氮磷检测器 土壤 噻嗪酮 基质效应 

分 类 号：X836[环境科学与工程—环境工程]