建立了茶叶中92种农药多残留的气相色谱分析方法.茶叶样品用乙腈一次件提取后,有机磷类农药经Envi-Carb固相小柱净化,用10 mL乙腈-甲苯(体积比为3:1)洗脱剂淋洗.气相色谱-火焰光度检测器(GC-FPD)检测;有机氯类和拟除虫菊酯类农约经串联Envi-Carb和NH2固相小柱净化,用5 mL乙腈-甲苯(体积比为3:1)洗脱剂淋洗,GC-电子捕获检测器(ECD)检测.采用外标法定量.添加回收试验的结果表明:92种农药的平均回收率为80.3%～117.1%,相对标准偏差为1.5%～9.8%.方法的检出限为0.002 5～0.10 mg/kg.该方法的灵敏度、准确度和精密度均符合农药残留测定的技术要求.
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