Determination of silver in multi-target geological samples by ICP-MS
In view of the Zr,Nb interference and effect on the accuracy of the measurement results in the determina-tion 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.
万方数据
维普
