加速溶剂萃取-凝胶渗透色谱-气相色谱质谱测定茶叶中7种农药残留

摘要

Acetonitrile-DCM (V/V,1/1) was employed as the solvent in accelerated solvent extraction.The extraction was purified by gel permeation chromatography (GPC) to remove macromolecular impurities and then followed by GC/MS analysis.The results showed that the recoveries were within 79.2％ -100.8％ and the RSD results were in the range of 3.15％-13.34％ based on 0.5μg standard addition.The method is fast,accurate,highly automated and applicable in daily tea analysis.%建立加速溶剂萃取-凝胶渗透色谱-气相色谱质谱法测定茶叶中7种农药残留的分析方法.样品用乙腈-二氯甲烷(V/V,1/1)作为溶剂,利用加速溶剂提取仪提取,提取液经过凝胶渗透色谱除去大分子杂质后,供GC/MS分析.添加浓度为0.5 μg时,回收率为79.2％～100.8％,相对标准偏差为3.15％～13.34％,方法具有自动化程度高、萃取效率高、净化效果好、精密度好,分析快速等优点,适用于茶叶中农药残留的日常检测工作.