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以前,我所对PtRh系列合金的主、次成份和必测杂质元素An、Fe用化学法测定。1986年后,用粉末试样、杯状电极、电流电弧摄谱法测定PtRh系列合金中十多个杂质元素。但上述两个方法,均不尽完善。前者难于满足对多元素的测定,后者亦难满足对次成份测定,且流程长、耗贵金属量多。文献[l,2]报道,采用外加内标,不准确稀释法,测定小量合金样品中主、次成份。我们根据自己的情况,把工作扩展到测定微量杂质元素,测定了PtRh,PdRh系列合金中的次成份Rh和十二个杂质元素。本方法取样、制样灵活,简便,快速,准确。
In the past, the main and minor components of the PtRh alloy and the An and Fe impurity elements must be chemically determined. After 1986, a dozen of impurity elements in the PtRh series of alloys were determined by powder samples, cupped electrodes, and current arc spectroscopy. However, these two methods are not perfect. The former is difficult to meet the determination of multi-element, which is also difficult to meet the sub-composition determination, and the flow length, consumption of precious metals and more. Literature [l, 2] reported the use of an external standard, inaccurate dilution method, a small amount of alloy samples were determined primary and secondary components. Based on our own situation, we extended our work to the determination of trace impurities and determined the minor components Rh and twelve impurity elements in PtRh and PdRh series alloys. The method of sampling, sample preparation flexible, simple, fast and accurate.