摘要
建立了QuEChERS-气相色谱-串联质谱同时检测鲜茶中联苯菊酯、溴氰虫酰胺、氯虫苯甲酰胺、噻虫胺、高效氯氟氰菊酯和螺虫乙酯残留的分析方法。样品选用乙腈提取,以乙二胺-N丙基硅烷吸附剂和多壁碳纳米管组合净化,结合GC-MS/MS检测。结果表明:在5~500μg/L范围内,6种杀虫剂呈现良好的线性关系,相关系数R 2≥0.995,目标化合物均存在基质增强效应。在0.005,0.5,5 mg/kg 3个添加水平下,目标化合物的平均回收率均在82.1%~109.2%之间,相对标准偏差(RSDs)为0.9%~4.1%。6种杀虫剂在鲜茶中的方法定量限(LOQ)均为5μg/kg。6种杀虫剂在鲜茶叶中的消解半衰期为3.0~14.1 d。方法适用于鲜茶叶中6种农药残留的检测。
A method for the simultaneous determination of bifenthrin,cyanamide,chlorantraniliprole,clothianidin,λ-cyhalothrin and spirotetramat residues in fresh tea was established by QuEChERS-gas chromatography-tandem mass spectrometry(GC-MS/MS).The sample was extracted with acetonitrile,purified with ethylenediamine-n propylsilane adsorbent and multi-wall carbon nanotubes,and detected by GC-MS/MS.The results showed that in the range of 5-500μg/L,the six insecticides have good linear relationship with the correlation coefficient R 2≥0.995,and the target compounds have matrix-induced response enhancement effect.At the three levels of 0.005,0.5 and 5 mg/kg,the average recoveries of the target compounds were ranged from 82.1%to 109.2%,and the relative standard deviations(RSDs)were ranged from 0.9%to 4.1%.The limits of quantitation(LOQ)of the six insecticides in fresh tea were 5μg/kg.The digestion half-life of the six insecticides in fresh tea leaves was 3.0 to 14.1 d.The method is suitable for detecting six pesticide residues in fresh tea leaves.
作者
杨松
王瑶
禾丽菲
黄学屏
慕卫
YANG Song;WANG Yao;HE Li-fei;HUANG Xue-ping;MU Wei(Key Laboratory of Pesticide Toxicology&Application Technique,College of Plant Protection,Shandong Agricultural University,Tai’an 271018)
出处
《分析试验室》
CAS
CSCD
北大核心
2019年第12期1459-1464,共6页
Chinese Journal of Analysis Laboratory
基金
山东省农业重大应用技术创新项目(20182130106)资助
关键词
气相色谱-串联质谱
鲜茶叶
杀虫剂
基质效应
添加回收
残留
消解
Gas chromatography-tandem mass spectrometry
Fresh tea
Insecticide
Matrix effect
Addition recovery
Residue
Digestion
