摘要
电感耦合等离子体质谱法测定银时,存在Zr、Nb干扰影响测定结果准确性的情况,本文采用王水水浴分解多目标地质样品,选择107Ag作为分析同位素、选择185Re与103Rh做双内标元素、确定300倍稀释倍数、最终采取离线校正的方式解决Zr和Nb对于结果的影响。通过分析土壤、水系沉积物系列国家标准物质,得出方法检出限为0.00675μg/g,测定下限为0.027μg/g,相对标准偏差(RSD)为3.37%~4.33%,检出限与精密度都达到多目标地质样品测试标准。该方法简洁有效,适合大批量样品的连续测定。
In view of the Zr,Nb interference and effect on the accuracy of the measurement results in the determination of silver by ICP-MS.In this paper,Aqua Regia in Water Bath digestion method is used to decompose multi-target geological samples,107Ag is selected as the isotope,185Re and 103Rh are selected as double internal standard elements,dilution ratio of 300 times is determined,and the effects of Zr and Nb on the results are solved by offl-ine correction method.By analyzing the national standard materials of soil and stream sediment series,the detection limit of the method is 0.00675μg/g,the lower limit of measurement is 0.027μg/g,the relative standard deviation(RSD)is 3.37%~4.33%,and the detection limit and precision reach the test standard of multi-target geological samples.The method is simple and effective and suitable for continuous determination of large quantities of samples.
作者
冯慧林
单程堃
何汉江
刘金龙
李玉慧
刘子建
Feng Huilin;Shan Chengkun;He Hanjiang;Liu Jinlong;Li Yuhui;Liu zijian(Geological Institute of China Chemical Geology and Mine Bureau,Zhuozhou,Hebei,072754,China)
出处
《化工矿产地质》
CAS
2024年第3期249-253,共5页
Geology of Chemical Minerals
基金
国家自然科学基金察尔汗盐湖资源精细化、高效开发利用应用基础研究(编号:2021-ZJ-773)。
关键词
ICP-MS
酸溶
多目标地质样品
银
干扰现象
ICP-MS
Acid soluble
Multi-target geological sample
Silver
Interference phenomenon
