毛细管气相色谱法检测荔枝中多效唑残留量

Residue Determination of Paclobutrazol in Litchi with Capillary Gas Choromatography

建立了荔枝果肉及全果中多效唑残留量的毛细管气相色谱检测方法。果肉及全果经粉碎、乙腈匀浆提取、氮吹浓缩、石墨化炭黑柱或活性炭脱色后,用HP–5柱进行分离,GC–NPD进行分析。结果表明,方法的平均回收率为85%～105%,变异系数为3.1%～4.3%,检出限为1.2μg/kg,方法简便、快速、准确,适合作为荔枝果肉及全果中多效唑残留量的检测方法。

A residue determination method for paclobutrazol residue in litchi with capillary gas chromatography was developed.The litchi puree was homogenized in a high-speed blender in acetonitrile,concentrated by an automatic thickener,decolored by bond elut carbon or active carbon,seperated by HP-5 capillary column,and determined by gas chromatography with NPD.The recovery range was 85%-105% with coefficient of variation from 3.1% to 4.3%.The limits of the method was 1.2 μg/kg.The method is simple,easy,quick and accurate and is suitable for the detection of paclobutrazol residue in litchi.