QuEChERS-GC/MS 法测板栗中 10 种有机磷农药残留

Determination of 10 Organophosphorus Pesticide Residues in Chestnut by QuEChERS-GC/MS

摘要:

QuEChERS 方法对板栗样品中 10 种有机磷农药进行前处理优化，建立了板栗有机磷残留量的快速前处理方法，并进行验证。通过对比不同的提取溶剂、取样量、除水剂用量、净化剂用量确定板栗 QuEChERS 前处理的最佳组合，净化完成后用 GC/MS 检测。10 种有机磷农药的线性相关系数均 > 0.998，最低检出限为 0.010~0.034 mg/kg，平均回收率为 80.1%~105.4%，相对标准偏差值为 3.5%~8.9%。该方法准确、快速、净化效果好，适用于板栗中多种有机磷农药残留的快速检测。

Abstract:

An analytical method for quick determination of 10 organophosphorus pesticide residues in chestnut by using QuEChERS-GC/MS was proposed. By comparing the different amount of extraction solvent, quantity of sample, water removal agent and adsorbent, the best combination of chestnut pretreatment was selected. Extraction of chestnuts after purification was detected by GC/MS. All of the pesticides linearity was more than 0.998. The detection limits were from 0.010 mg/kg to 0.034 mg/kg. The average recovery rates were from 80.1% to 105.4% with relative standard derivations of 3.5% to 8.9%. This method was rapid, simple, accurate and reliable. It can be applied to determine the organophosphorus pesticide multiresidues in chestnut.