直接进样-冷原子吸收光谱法测定保健食品中汞含量  

Determination of trace mercury in health food by straight injection of sample followed by cold atomic absorption spectrometry

作　　者：李延志[1] 李晨辉[1] 石虹[1] 张弦[1] 陈超明[1] 冯白茹[1] 陈浩桉[1] 

机构地区：[1]广东省药品检验所,广州510180

出　　处：《中国卫生检验杂志》2008年第6期1093-1094,共2页Chinese Journal of Health Laboratory Technology

基　　金：广东省科技厅资助项目(2007B031407003);广州市科技局资助项目(2007Z2-E5061);广东省药品检验所资助项目(SN20071215)

摘　　要：目的：建立直接测定保健食品汞含量的无损分析方法。方法：采用一种新型冷原子吸收测汞仪,样品经添加辅助剂后直接测定。结果：本法检出限可达0.004 ng,检测范围为0.5～10 ng,加标回收率为98.7%～104.3%,方法精密度为0.5%（n=6）。结论：本法直接进样测定,极其简便、省时,用于多类保健食品中汞含量测定,效果显著优于现行方法。Objective：To set up a novel method for determination of trac mercury in health food by cold atomic absorption speetrometry（AAS）. Methods：The total mercury in different samples was determined by straight injention with a new type of cold atom absorption speetrophotometry. Results：The linear range of the assay was 0. 5 - 10 ng with detection limit of 0. 004 ng and the correlative coefficient was 0. 9999. The analytical result was reliable with the recovery of 98.7% - 104. 3% as the standard additive levels of 3.0 ng and the average precision （RSD） of 0.5%. Conclusion： The method is of high sensitivity, stability and selectivity, And the method proposed had been successfully applied to the direct determination of total mercury in health food.

关 键 词：直接进样 汞 无损分析 保健食品 

分 类 号：O657.31[理学—分析化学]