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分散液相微萃取测定苹果中灭线磷马拉硫磷和毒死蜱残留

Keywords: 分散液相微萃取,有机磷农药,样品前处理

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Abstract:

采用液液分散微萃取与气相色谱-火焰光度检测器联用技术,提出了可用于苹果中有机磷农药残留检测的一种快速、灵敏的新方法,并通过试验对提取条件进行了优化。结果表明,该方法成功地应用到苹果样本的检测。在优化的条件下最低检出限从1.32~3.58μg·mL-1,相对标准偏差为11.06%~15.39%,分析标准曲线采用五点法(浓度从0.5~20μg·mL-1)来绘制,线性的变化从0.9773~0.9976。为了评价样本的基质效应,用有机磷农药从3个不同浓度水平对样本进行添加,回收率从64.0%~89.0%,并且没有发现基质效应。液液分散微萃取不仅操作简便而且有机溶剂使用量极少,是一种顺应时代要求的环境友好型萃取方法。

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