摘要
目的：分别用两种方法预处理豆奶粉后用ICP-MS对样品溶液中的镉进行测定,对两种方法进行比较。方法：样品分别经湿法消化和微波消化后定容到一定体积,然后直接用ICP-MS进行分析,用混和内标校正基体干扰和漂移。结果：两种前处理方法产生的结果精密度均优于3%,回收率介于95%-100%,且对标准参考物质的测定结果均符合证书值要求。结论：两种处理方法均有较好的精密度和准确度,测定结果之间并无显著性差异。
Objective：To compare the two digestion ICP - MS methods of detecting cadmium in soy milk powder. Methods： After wet digestion and microwave digestion respectively, the samples were determined directly by inductively coupled plasma mass spectrometry using mixed internal standard to correct matrix interference and signal drifting. Results：The RSD of two methods was less than 3.0% , recoveries 95.0% - 100% and the results of analyzing standard materiel were satisfactory. Conclusion： Two methods all have good precision and veracity and there is no obvious difference between the results from two methods.
出处
《中国卫生检验杂志》
CAS
2009年第4期784-785,共2页
Chinese Journal of Health Laboratory Technology
基金
广州市医学科研课题(2008-YB-224)
关键词
ICP-MS
豆奶粉
镉
Inductively coupled plasma mass spectrometry
Soy milk powder
Cadmium
