微波消解ICP-MS法测定苦笋中21种元素含量

Content Determination of 21 Elements in Soybean Shoots by Microwave Digestion ICP-MS

目的:建立微波消解ICP-MS法同时测定苦笋样品中21种元素含量的方法,并为苦笋的综合开发提供科学依据。方法:采用硝酸进行消解,并运用ICP-MS法同时测定不同产地苦笋中Li、Be、B、Mg、Ca、Cr、Mn、Fe、Co、Ni、Cu、Zn、As、Se、Sr、Cd、Sn、Sb、Tl、Pb、Bi的含量。结果:21种元素的线性相关系数均大于0.9988,各元素的平均加样回收率均在89.8%~98.5%范围内,RSD为0.13%~6.28%。结论:微波消解ICP-MS法测定苦笋样品中元素含量的方法,具有操作简单、分析速度快、准确度高等优点。苦笋中人体必需元素Mg、Ca、Fe、Mn、Zn、B等含量较高;毒性非必需元素As、Cd、Sn、Sb、Tl、Pb等含量较低,是一种具有进一步深入研究价值的药食两用中药。

Objective:To establish a microwave digestion ICP-MS method for simultaneous determination of 21 elements in bitter bamboo shoot samples, and to provide a new scientific basis for the comprehensive development of bitter bamboo shoots.Methods:Nitric acid was used for digestion, and ICP-MS was used to simultaneously measure the content of Li, Be, B, Mg, Ca, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Sr, Cd, Sn, Sb, Tl, Pb and Bi in bitter bamboo shoots from different areas. Results:The linear correlation coefficients of the 21 elements were all greater than 0.998 8, and the average recovery of each element was between 89.8%~98.5%, and the RSD was 0.13%~6.28%. Conclusion:The method of microwave digestion ICP-MS for the determination of elemental content in bitter bamboo shoots has the advantages of simple operation, fast analysis and high accuracy. The content of essential elements such as Mg, Ca, Fe, Mn, Zn and B in bitter bamboo shoots is high, and the content of toxic non-essential elements such as As, Cd, Sn, Sb, Tl and Pb is low. It is a Chinese medicine for medicine and food that can be further studied.