摘要
目的:研究采用加速溶剂萃取法提取土壤中的阿特拉津、百菌清、溴氰菊酯和环氧七氯微量残留,气相色谱-电子捕获检测器法定量检测的分析方法。方法:采集某地土壤样品,风干后,打成细粉,取粉碎后的土壤样品约12 g,置萃取池中,用环己烷进行萃取,萃取液氮吹至近干,加1mL乙腈溶解,涡旋1 min后滤过,上气相色谱仪定量检测。结果:阿特拉津、百菌清、溴氰菊酯和环氧七氯浓度范围0.01~8.0μg/mL内线性关系良好,相关系数均不低于0.995;检出限在0.006~0.010 mg/kg范围内;加标回收率在84.1%~92.3%之间;重复性RSD分别为2.85%、3.19%、2.77%和3.47%。结论:结果表明,方法具有操作简单、检测准确等特点,可以用于土壤中微量农药残留的检测。
12 g of crushed soil samples were taken and extracted with cyclohexane,blown to nearly dry with extraction liquid nitrogen,dissolved with 1 mL acetonitrile,filtered for 1 minute,and quantitatively detected by gas chromatography.The linearities of atrazine,chlorothalonil,deltamethrin and heptachlor epoxide were good in the concentration range of 0.01-8.0μg/mL,the correlation coefficients were no less than 0.995.The detection limits were in the range of 0.006-0.010 mg/kg,and the recovery rates were in the range of 84.1%-92.3%.The RSD were 2.85%,3.19%,2.77% and 3.47%,respectively.This method is simple and accurate,and can be used for the detection of pesticide residues in soil.
作者
刘巍
Liu Wei(Linyi Government of Fairs Service Center of Shandong Province,Linyi 276001,China)
出处
《分析仪器》
CAS
2021年第2期5-8,共4页
Analytical Instrumentation
关键词
加速溶剂萃取
气相色谱
电子捕获
土壤
Accelerated solvent extraction
Gas chromatography
Electron capture
Soil
