微波消解-ICP-AES法对不同产地牛蒡子无机元素分析与评价

目的：测定20批不同产地牛蒡子无机元素的含量。方法：采用微波消解法处理样品，电感耦合等离子发射光谱（ICP-AES）同时测定26种元素含量，采用主成分分析法对不同产地牛蒡子无机元素的含量进行分析和综合评价。结果：不同产地牛蒡子含有12~14种无机元素，其中K，Al，Fe，S，Zn，Cu 6种元素含量较丰富；主成分分析选择4个因子，并对不同产地牛蒡子进行综合评价，其综合评价函数为F=0.298 74F₁+0.257 56F₂+0.144 49F₃+0.135 19F₄，结果发现浙江、河北和吉林3个产地的牛蒡子样品的综合排序为1~3位，表明从无机元素考虑这3个产地牛蒡子样品品质较好。结论：该方法快速、简便，数据准确可靠，可为不同产地牛蒡子的质量分析和综合开发利用提供参考。

Evaluation and Analysis of Inorganic Elements in Different Origins of Fructus Arctii by Microwave Digestion-ICP-AES

Objective: To determine the inorganic elements of 20 batches of Fructus Arctii by microwave digestion-ICP-AES. Method: Samples were digested by nitric acid and hydrogen peroxide. The content of 26 elements in Fructus Arctii was determined by ICP-AES, a blank experiment was made at the same time. Principal component analysis (PCA) was used to evaluate the quality of different batches of Fructus Arctii. Result: Fructus Arctii contained more than 12 inorganic elements and the content of six elements, including K, Al, Fe, S, Zn, Cu was higher. PCA with four factors (F₁, F₂, F₃, F₄) selected could be used to evaluate the quality of Fructus Arctii. The function was following F=0.298 74F₁+0.257 56F₂+0.144 49F₃+0.135 19F₄.The samples from Zhejiang, Hebei and Jilin provinces were the top three which indicated the quality in those regions were better based on inorganic elements. Conclusion: This method is fast, simple and accurate. All the results can provide a scientific basis for the quality analysis and comprehensive utilization of Fructus Arctii.