HPLC-MS/MS法测定茶叶中灭多威、除虫脲和杀螟丹的残留量

Determination on Residual Quantity of Methomyl, Diflubenzuron and Cartap in Tea by HPLC-MS/MS

摘要: 采用HPLCMS/MS法对茶叶中灭多威、除虫脲和杀螟丹含量进行测定，结果表明：3种农药在0.1~10 μg/mL质量浓度范围内呈良好线性，相关系数r≥0.999，回收率为82%~105%，相对标准偏差RSD为0.8%~5.3%，检出限为0.002~0.016 mg/kg，该方法快速、简便、灵敏、准确，在实际样品检测应用中结果良好，能满足日常茶叶中有机磷农药残留的分析测定要求。

Abstract: The residual quantity of methomyl, diflubenzuron and cartap in tea was determined by HPLCMS/MS. The results showed that good linearities were obtained for three pesticides at the concentration of 0.1-10 μg/mL with correlation coefficients more than 0.999. The recovery ratios were 82%-105%, the relative standard deviations(RSD) were 0.8%-5.3% and the detection limits were 0.002-0.016 mg/kg. The method was quick, simple, sensitive and accurate, and it could satisfy the request of the determination of organophosphorus pesticides residue in tea.