主题：【求助】求 GC2010检测茶叶666 DDT方法条件

楼主，你好！相关的方法可以参考： SN 0147-92 出口茶叶中六六六,滴滴涕残留量检验方法  http://www.instrument.com.cn/bbs/shtml/20060712/480933/

在文献求助-应助版面的帖子（1楼）：  http://www.instrument.com.cn/bbs/shtml/20080430/1243390/
有一篇文献：
Simultaneous determination of 102 pesticide residues in Chinese teas by gas chromatography–mass spectrometry
Abstract：
An efficient and sensitive method for simultaneous determination of 102 pesticide residues in teas has been established and validated. The multiresidue analysis of the pesticides in teas involved extraction with acetone–ethyl acetate–hexane, clean-up using gel permeation chromatography (GPC) and solid-phase extraction (SPE), and subsequent identification and quantification of the selected pesticides by gas chromatography–mass spectrometry (GC–MS) under retention time locked (RTL) conditions. For most of the target analytes, the optimized pretreatment processes led to no significant interference on analysis from sample matrix, and the determination of 102 compounds was achieved in about 120 min. Pesticide residues could be determined in low sub-ppb range, from 0.01 g/mL for hexachlorobenzene to 2.5 g/mL for propargite, with average recoveries ranging from 59.7 to 120.9% (mean 88%) and relative standard deviations (RSDs) in the range 3.0–20.8% (mean 13.7%) for all analytes across three fortification tea levels. The limits of detection (LODs) were much lower than the maximum residue levels established by the European Union (EU) legislations.

这篇文献有相关有机氯农药的方法，您可以参考一下，如果需要可以去下载。