HMI-ICP-MS和AAS测定大米中微量元素的方法比较

Comparison of determination of trace elements in rice by HMI-ICP-MS and AAS

目的:探讨带高基体进样系统(HMI)ICP-MS测定大米中微量元素的可行性,并与原子吸收(AAS)测定方法进行比较。方法:将大米消解后分别用HMI-ICP-MS和AAS测定其中铁、铜、锌、镉。结果2种方法对国家标准参考物质大米粉的检测结果均在可信范围内。结论:HMI-ICP-MS可以准确快速地测定大米粉中的微量元素,并可以耐受更高的总固体含量。

Objective：To research the feasibility of determination of trace elements in rice by an induc-tively coupled plasma mass spectrometry （ICP-MS） with high matrix sample introducing system （HMI） and compare with the result of detecting by atomic absorption spectrometry （AAS） .Method：Rice samples were digested and determined Iron ,Copper ,Zinc and Cadmium by HMI-ICP-MS and AAS. Result ：The results of determination are within the scope of standard reference rice. Conclusion ：It is accurate and rapid determination of trace element in rice by HMI-ICP-MS and allowe higher total dissolved solids.