摘要
基于全二维气相色谱-四极杆飞行时间质谱(GC×GC-Q-TOF MS)建立了土壤样品中24种有机磷和20种有机氯农药残留的快速同时检测方法,样品经索氏提取后直接采用全二维气相色谱进行分离,有效实现了杂质与目标物的完全族分离效果。以24种有机磷和20种有机氯农药的高分辨精确质量特征离子进行定量分析,结果表明,44种农药均在20~3000μg/L质量浓度范围内呈线性关系,相关系数(r^(2))为0.9903~0.9999,检出限(LOD)为0.3~7.9μg/L;方法的平均回收率为93.0%,平均相对标准偏差(RSD,n=5)为6.9%。该文可为土壤中农药残留的高通量快速筛查提供方法参考。
A comprehensive two-dimensional gas chromatography quadrupole time-of-flight mass spectrometry(GC×GC-Q-TOF MS)was developed for the rapid and simultaneous determination of 24organophosphorus and 20 organochlorine pesticides in soil.The impurities and analytes in samples were perfectly intragroup-separated by two-dimensional gas chromatography after soxhlet extraction.24 organophosphorus and 20 organochlorine pesticides were determined by using the high resolution molecular mass characteristic ions.Results showed that there existed linear relationships for 44pesticides in the concentration range of 20-3000μg/L,with their correlation coefficients(r^(2))of 0.9903-0.9999 and limits of detection(LOD)of 0.3-7.9μg/L.The average value for fortified recovery was 93.0%,and accordingly the relative standard deviation(RSD,n=5)was 6.9%.The method could provide a reference for the high-throughput rapid screening of pesticide residues in soil.
作者
余磊
赵志燊
赵杰
向章敏
YU Lei;ZHAO Zhi-shen;ZHAO Jie;XIANG Zhang-min(Key Laboratory for Degradation Technologies of Pesticide Residues with Superior Agricultural Products in Guizhou Ecological Environment,Guiyang University,Guiyang 550005,China;Guangdong Provincial Key Laboratory of Emergency Test for Dangerous Chemicals,Guangdong Institute of Analysis,Guangdong Academy of Sciences,Guangzhou 510070,China)
出处
《分析测试学报》
CAS
CSCD
北大核心
2021年第8期1184-1189,共6页
Journal of Instrumental Analysis
基金
贵阳市科技局贵阳学院专项资金资助[GYU-KY-(2021)]
贵州生态环境中优势农产品残留农药降解关键技术研究重点实验室项目[黔教合KY字(2018)005]。
关键词
全二维气相色谱-四极杆飞行时间质谱
有机磷
有机氯
土壤
comprehensive two-dimensional gas chromatography quadrupole time-of-flight mass spectrometry
organophosphorus pesticides
organochlorine pesticides
soil
