电感耦合等离子体发射光谱法测高纯银中19种微量元素

应用硝酸溶解高纯银锭，用电感耦合等离子体发射光谱法测高纯银中Al、Ca、Cd、Co、Cr、Cu、Fe、Mg、Mn、Ni、Pb、Au、Pd、Pt、Rh、Si、Sn、Te、Zn等19种微量元素.为获得准确实验结果，选择合适的仪器条件和分析谱线，测定曲线做银含量匹配，并在此测定条件下分析结果的回收率和准确性，结果满意.为研究银沉淀对测定元素的影响，利用银生成AgCl沉淀的方法分离掉银，测定清液中微量元素含量.结果表明银沉淀对测试影响不大.综合测试结果可以得出，在测试过程中不需要用银做基体匹配，这样既排除了银的干扰又降低了样品测试成本.

DETERMINATION OF NINETEEN TRACE ELEMENTS IN HIGH PURITY SILVER BY ICP-AES

Nitric acid is used to dissolve the high purity silver ingot, with ICP-AES to determine the 19 trace elements as Al, Ca, Cd, Co, Cr, Cu, Fe, Mg, Mn, Ni, Pb, Au, Pd, Pt, Rh, Si, Sn, Te and Zn within. To obtain accurate experimental results, select appropriate instrument conditions and analysis spectral lines, then measure the curves to match the silver content. The recovery and accuracy of results prove to be satisfactory. Silver is separated as AgCl precipitate and the trace element contents in the supernatant is determined. The results show that the silver precipitation has little effect on the determination. Therefore, the test can be achieved without the matrix matching of silver. This method can thus eliminate silver interference and reduce sample testing cost.