ICP-OES,AAS和AFS测定肝癌高发区红豆中23种矿质元素含量

Determination of 23 Mineral Elements in Red Beans Produced in High Risk Areas for Primary Liver Cancer by ICP-OES Combined with AAS and AFS

收集了6种产自肝癌高发区——江苏省启东市的红豆和6种产自国内其他地区的红豆,经过微波消解或干灰化法处理后,采用电感耦合等离子体发射光谱法(ICP-OES)、原子吸收光谱法(AAS)和原子荧光光谱法(AFS)测定了其中A l、B、Ba、Ca、Cd、Co、Cr、Cu、Fe、Hg、K、Mg、Mn、Mo、Na、N i、P、Pb、Rb、S、Se、Sr和Zn共23种矿质元素的含量,并用生物标准参考物质黄豆评价了分析方法的准确度。结果表明,红豆中人体必需宏量、微量元素含量极为丰富,而传统意义上的有害元素Pb、Cd、Hg含量均较低;与国内其他产地的红豆相比,江苏省启东市产红豆中B、Mg含量显著偏高(P<0.05),而大多数矿质元素含量两相比较并不存在显著性差异。产自江苏省启东市的部分红豆样品和产自江苏省海门市的红豆样品中Cd含量极低,预示着自然生态环境中有效态Cd缺乏可能与肝癌的高发病率和高死亡率存在一定程度的相关性。

Based on dry ashing and microwave - assisted decomposition methods, the content of A1, B, Ba, Ca, Cd, Co, Cr, Cu, Fe, Hg, K, Mg, Mn, Mo, Na, Ni, P, Pb, Rb, S, Se, Sr and Zn in six red bean samples produced in Qidong city in other places of China was determined by ICP , Jiangsu province and six red bean samples produced - OES combined with AAS and AFS, a biological standard reference material soybean（ GBW lO013）was used to verify the accuracy and the precision of analytical method. The results show that the content of some beneficial macro - and micro - elements in these red bean samples is rather high, whereas the content of some harmful elements such as Pb, Cd, Hg is very low. Compared with those in red bean samples produced in other places of China, the contents of B and Mg in red bean samples produced in Qidong city, Jiangsu province are significantly high （ P 〈0. 05 ）, however, there were no significant differences in the content of most mineral elements between two groups of red bean samples. It is especially worth mentioning that the content of Cd in some red bean samples produced in high risk areas for primary liver cancer are much low, which presaged that a positive correlation may exist between the deficiency of available cadmium in environment and high incidence of primary liver cancer.