水蛭、海马药材拟除虫菊酯类农药残留分析

目的:分析不同来源动物性药材水蛭、海马的5种拟除虫菊酯农药残留。方法:收集不同地区药材市场流通的水蛭11批、海马5批,用石油醚-丙酮混合溶剂超声提取,固相萃取法净化,气相色谱-电子捕获检测器(ECD)测定。结果:11批次水蛭样品中均检出氯氰菊酯农药残留,另有4批检出氰戊菊酯,但未超标;5批次海马样品均未检出5种拟除虫菊酯农药残留。结论:动物性药材海马不存在拟除虫菊酯农药残留问题,水蛭的氯氰菊酯农药残留问题应引起重视,分析其污染来源,加以控制。

Analysis of 5 Pyrethroid Pesticide Residues in Hirudo and Hippocampus

Objective: To investigate the levels of 5 pyrethroid pesticide residues in two kinds of Chinese traditional medicines,i.e.Hirudo,Hippocampus.Methods: 11 samples of Hirudo and 5 samples of Hippocampus were collected and identified.The 5 pyrethroid pesticide residues in samples were extracted by solid-phase extraction to remove the interferences of co-extractives,and then were analyzed by gas chromatorgraph(GC) equipped with an electron capture detector,qualified by the chromatographic peak's retention time and quantified by the external standard method.Results: The 5 pyrethroid pesticied residues were not detected in 5 samples of Hippocampus.Among 11 samples of Hirudo,the Cypermethrin were detected in all samples,and Fenvalerate were detected in 4 samples without exceeding the limit.Conclusion: The result suggest that the Hippocampus are not contaminated by the residues of 5 pyrethroid pesticides.The precaution procedure should be taken to control pyrethroid pesticide residues in Hirudo.