电感耦合等离子体原子发射光谱法测定钛合金中贵金属元素

介绍了电感耦合等离子体原子发射光谱法（ICP-AES）测定钛合金中贵金属元素Ir、Au、Pd、Rh、Ru的方法。通过溶样方法选择、仪器工作 参数优化、基体和共存元素对待测元素的影响等试验，确定了采用盐酸、氢氟酸和硝酸溶解样品，用基体匹配方法消除基体钛对测定的影响 。在仪器最佳工作条件下、选择了Ir 224.268nm 、Au 267.595 nm 、Pd 340.458 nm、Rh 343.489 nm 、Ru 240.272 nm 谱线为分析线，测 得方法的检出限是0.000 1 ～0.003 μg/mL。加标回收及精密度试验表明：本方法能满足钛合金中Ir、Au、Pd、Rh、Ru等元素分析的要求， 回收率在90%～110%之间，相对标准偏差小于14%（n=6）。

Determination of precious metal elements in titanium alloy by inductively coupled plasma atomic emission spectrometry

The determination method of metal elements such as Ir, Au, Pd, Rh and Ru in titanium alloy by inductively coupled plasma atomic emission spectrometry (ICP-AES) was introduced. The selection of sample dissolution method, the optimization of instrumental working parameters, the influence of matrix and coexisting elements on determination were tested. In this study, the samples were dissolved in hydrochloric acid, hydrofluoric acid and nitric acid. The effect of matrix titanium was eliminated by matrix matching method. Under the optimal instrumental conditions, Ir 224.268 nm, Au 267.595 nm, Pd 340.458 nm, Rh 343.489 nm and Ru 240.272 nm were selected as the analytical lines. The detection limit of method was 0.000 1-0.003 μg/mL. The recovery test and precision test showed that, the proposed method could meet the analytical requirements of Ir, Au, Pd, Rh and Ru in titanium alloy. The recoveries were 90 %-110 %, and the relative standard deviation (RSD, n=6) was smaller than 14 %.