摘要
目的建立一种快速检测矿泉水中微量砷、锑、铋的方法。方法研究用硝酸作介质,通过氢化物发生-三道原子荧光光度法同时测定矿泉水中砷、锑、铋的最佳条件;研究不同预还原剂对3种元素荧光强度的增敏效果;比较同时测定和单独测定矿泉水中砷、锑、铋的统计学差异。结果在选定的优化条件下,砷的线性范围为0μg/L^10μg/L,r=0.999 9,检出限为0.004 9μg/L,回收率为97.0%~103.4%,RSD为0.53%~3.36%;锑的线性范围为0μg/L^10μg/L,r=0.999 9,检出限为0.004 9μg/L,回收率为98.7%~104.4%,RSD为0.81%~2.16%;铋的线性范围为0μg/L^10μg/L,r=0.999 8,检出限为0.013μg/L,回收率为97.7%~105.2%,RSD为1.20%~4.74%。3种元素同时测定和单元素测定的结果差异无统计学意义。结论该测定方法快速、简单、准确、灵敏度高,适用于矿泉水中砷、锑、铋的快速检测。
Objective To establish a method for rapid determination of trace As and Sb and Bi in mineral water. Methods Studied on optimal conditions with nitric acid as media,for simultaneous determination of As and Sb and Bi in mineral water by HG- AFS. To study the different pre- reductant sensitizing effect on the fluorescence intensity of three elements. Statistic difference was compared between the results of three element simultaneous determination and single element determination in mineral water. Results In the selected optimum conditions,the linear range of arsenic 0 μg / L- 10 μg / L,r = 0. 999 9,the detection limit was 0. 004 9 μg / L,the recovery rate was 97. 0%- 103. 4%,RSD was 0. 53%- 3. 36%; the linear range of antimony was 0 μg / L- 10 μg / L,r = 0. 999 9,the detection limit was 0. 004 9 μg / L,the recovery rate was 98. 7%-104. 4%,RSD was 0. 81%- 2. 16%; the linear range of bismuth was 0 μg / L- 10 μg / L,r = 0. 999 8,the detection limit was0. 013 μg / L,the recovery rate was 97. 7%- 105. 2%,RSD was 1. 20%- 4. 74%. There was no statistical significance between the measurement results of three element simultaneous determination and single element determination. Conclusion The method is rapid,simple and accuracy is suitable for rapid detection of trace As and Sb and Bi in mineral water.
出处
《中国卫生检验杂志》
CAS
2015年第14期2289-2292,2295,共5页
Chinese Journal of Health Laboratory Technology
