目的: 通过测定不同产地的广地龙中多种金属元素含量,运用主成分分析和判别分析准确溯源广地龙的生产产地。方法: 采用电感耦合等离子体发射光谱(ICP-OES)和电感耦合等离子体质谱(ICP-MS)对6个产地60个广地龙(又称参环毛蚓)样品(安徽AH,河南商水HNSH,江苏盐城JSYC,上海奉新SHFX,上海康桥SHKQ,上海泥城SHNC)中的25种元素含量进行了测定,并通过SPSS26软件对结果进行标准化,消除各元素间量纲差异,再对其进行主成分分析。结果: 可以将25个指标元素提取5个主成分,方差贡献率达84.6%,基本保留了原变量的大部分信息。以5个主成分为原始变量,建立判别典型函数,利用判别典型函数可以对6个不同产地的60个广地龙样品100%进行正确判别。结论: 该方法可为不同产地的广地龙溯源研究提供新方法。
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