贵金属元素铂和铱是具有催化活性的物质,用于制备多种类型的催化剂,本文采用发射光谱交流电弧小孔电极粉末法,直接测定三氧化二铝中0.5%以下的铂铱含量,相对偏差小于5%。实验表明,不同晶型的三氧化二铝基体对分析线强度的影响是十分明显的,通过选择合适的内标元素,将这种影响控制在分析误差范围内,可取得满意的分析结果。 Precious metal elements platinum and iridium are catalytically active substances for the preparation of a variety of types of catalysts. In this paper, the emission spectrum of AC small-hole electrode powder method, direct determination of aluminum oxide content of less than 0.5% of platinum iridium, the relative deviation Less than 5%. Experiments show that the influence of different crystal forms of alumina matrix on the analytical line intensity is very obvious. Satisfactory analysis results can be obtained by selecting suitable internal standard elements and controlling the influence within the analytical error range.