该文采用ICP-MS测定其无机元素含量和绘制元素指纹图谱、用WM/T2-2004对重金属元素进行质量评价,借助主成分分析法确定特征元素.结果表明:太子参无机元素的含量在0057~959 mgkg之间、变异系数在0134~1.478之间,90%太子参中Cd、As、Pb、Hg含量低于WM/T2-2004标准,太子参重金属限量值为:Cr≤65 mg/kg、Cu≤10mg/kg、As≤20 mg/kg、Cd≤0.3 mg/kg、Hg≤0.15mg/kg 、Pb≤4.0 mg/kg,无机元素指纹图谱的特性可以为鉴定太子参质量和区分太子参与其他中药材提供依据,Cd、Cu、Co、Zn、Fe、Ca、Mg、Al是太子参的特征无机元素.黔产太子参中含有丰富的无机元素,90%样品重金属含量未超过现有评价标准,拟定太子参重金属限量值参考值、建立元素指纹图谱和确定了特征无机元素.
By analyzing the contents of inorganic elements in Radix Pseudostellariae from Guizhou Province,the aim was to assess the present quality of Radix Pseudostellariae,set limited standards of heavy metals,establish element fingerprints,and find out the characteristic elements.ICP-MS was used to measure the content of inorganic elements and map the element fingerprints.Additionally,WM/T2-2004 was applied to evaluate the quality of heavy metal elements,and the characteristic elements were determined by principal component analysis.The results showed that the contents of inorganic elements in Radix Pseudostellariae were between 0.057 and 959 mg/kg with the coefficients of variation ranging from 0.134 to 1.478,and the contents of Cd,As,Pb,and Hg were below the Standard of WM/T2-2004 in 90% of Radix Pseudostellariae.The standard limits of heavy metals in Radix Pseudostellariae were Cr≤6.5 mg/kg,Cu≤10 mg/kg,As≤2.0 mg /kg,Cd≤0.3 mg/kg,Hg≤0.15 mg/kg,and Pb≤4.0 mg/kg.The features of the inorganic elements fingerprints could provide theoretical basis of identifying the quality of Radix Pseudostelladae and distinguishing Radix Pseudostelladae from other Chinese herbal medicines.The characteristic inorganic elements of Radix Pseudostellariae were found to be Cd,Cu,Co,Zn,Fe,Ca,Mg,and AI.Radix Pseudostellariae from Guizhou Province contained abundant inorganic elements,and the contents of heavy metals were below the evaluation criterion.The study provided a reference for the future development of the limiting values of heavy metals in Radix Pseudostellariae.