摘要
目的:应用电感耦合等离子体质谱法(ICP-MS)测定紫菜、海带中铅、镉含量。方法:用微波消解进行样品前处理,以In,Bi作内标,采用电感耦合等离子体质谱法测定紫菜、海带中铅、镉含量。结果:线性范围宽,相关系数大于0.999;方法的相对标准偏差小于等于6%;方法的准确度:选择美国标准物质牡蛎(NBS1566)、贻贝(GBW08571),分别测定Pb、Cd含量,测定值均在标准值范围内。结论:电感耦合等离子体质谱法(ICP-MS)测定紫菜、海带中铅、镉含量,方法简单、快速、灵敏度高、线性范围宽、干扰少。
Objective:To determine the content of lead and cadmium in laver and kelp samples by the inductively coupled plasmamass spectrometry( ICP- MS). Methods:The content of lead, cadmium in laver and kelp were pretreated by microwave digestion and then analyzed by ICP - MS using In, Bi as an internal standards. Results:The linear correlation coefficients for all elements were r 〉 0. 999. The precision of the methods (RSD) was lower than 6. 0 %. The results were within the range of the standard reference materials of Oyster tissue (NBS1566) and Mussel( GBW08571 ). Conclusion:The method is simple, rapid, sensitive and accurate with wide linear range. No interferences have been found.
出处
《中国卫生检验杂志》
CAS
2008年第11期2290-2291,共2页
Chinese Journal of Health Laboratory Technology
关键词
电感耦合等离子体质谱
微波消解
紫菜
海带
铅
镉
Laver
Kelp
Lead
Cadmium
Inductively coupled plasma- mass spectrometry
Microwave digestion