茶叶中几种例行监测农药残留的气相色谱法测定

Determination of Several Pesticide Residues in Tea by Gas Chromatography

采用氟罗里硅土／活性炭混合柱柱层析净化方法，以毛细管柱、电子捕获检测器（GC-ECD）及火焰光度检测器（GC—FPD）的气相色谱方法测定了茶叶中滴滴涕、三氯杀螨醇、联苯菊酯、氯氰菊酯、澳氰菊酯、氰戊菊酯；敌敌畏、乙酰甲胺磷、甲胺磷、乐果、杀螟硫磷、喹硫磷等多种农药残留。添加回收率在75．5％一115．3％之间，相对标准偏差为1．2％一5．8％，检出限为0．01—0．1mg／kg，方法具有净化效果好、适用、快速等特点，可满足茶叶中多种农药残留检测的需要。

A method for determination of several pesticide residues （ DDT, Dicofol, Cypermethin, Bifenthrin, Eltamethrin, Fenvalerate ; DDVP ;Acephate, Methamidophos, Dimethoate, Fcnitrothion, Quinalphos）in tea was developed by GC-ECD and GC-FPD with a purified method using a column packed with active carbon and Florisil. The recoveries ranged from 75.5 % - 115.3 % ,with an average RSD of 1.2 % - 5.8 %. The detection limits of this method were between 0.01 -0.1 mg/kg. This method was rapid,high-decontaminating and suitable,lt could fulfill the requirements for the analysis of pesticide multi-residues in tea.