金针菇中有机磷农药残留的快速检测方法研究

Practical Preventive Medicine(2015)

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Abstract
目的 建立一种用气相色谱法快速、准确同时测定金针菇中19种有机磷农药残留的方法. 方法 样品经乙腈匀浆提取后,氮气吹至近干,用丙酮溶解残渣,经DB-1701柱分离进入火焰光度检测器(FPD)检测金针菇中有机磷农药.结果 19种农药在0.01~0.4 μg/ml浓度范围内具有良好的线性关系(r≥0.998);在0.025、0.05和0.2 mg/kg三个浓度水平的加标回收率为66.8%~124.6%;相对标准偏差(RSD)为2.17% ~9.65%;方法检出限为0.0004~0.002mgkg. 结论 本法简单、快速、可靠,成本低,适用于金针菇中有机磷农药残留的快速检测.
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Key words
Flammulina velutipes,Organophosphorus pesticide residue,Rapid determination,Gas chromatograph
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