一起鱼类农药中毒的快速检测

A fast detection method for pesticide in dead fish

目的:通过摸索优化某水库中毒鱼类死亡原因检测方法,为今后发生类似的鱼类死亡事件建立检测方法提供参考。方法:将采集的死鱼样品、水库水样和上游溪水水样进行相应的前处理后用气相色谱-质谱联用仪(GC-MS)在全扫描(Scan)模式下进行初筛,然后在选择性离子(SIM)模式下用标准物质进行定性和定量检测。结果:在死鱼样品和水库水样中均检测到甲氰菊酯,其含量分别为0.056 mg/kg和0.041 mg/L。结论:本方法简单、快速,准确的对鱼类因农药致死的检测分析,有较大的参考价值。

Objective：Through seeking for a optimized method of discovering the reason how fish in a reservoir were poisoned,to provide reference basis for detection of suspicious substances leading to the dead fish.Methods： The dead fish and water from the reservoir and upstream rivulet were analyzed by gas chromatography-mass spectrometry（GC-MS） under Scan and SIM modes.Then the qualitative and quantitative analysis was performed in the selective ion mode（SIM） using standard substances.Results： Fenpropathrin was detected in the samples of dead fish and reservoir water,the concentration was 0.056 mg /kg and 0.041 mg/L respectively.Conclusion： The simple,fast and accurate method established in this study can be applied in the detection and analysis of pesticide in dead fish,having significant reference value on similar affair in future.