聚酰胺分离富集催化动力学光度法测定痕量钯Ⅱ

Catalytic Kinetic Spectrophotometric Determination of Trace Palladium after Separation and Enrichment by Polyamide

研究了在稀硫酸的介质中 ,痕量钯 阻抑次磷酸钠还原 ;铍试剂 褪色的指示反应及其动力学条件 ,据此建立测定痕量钯 的新方法 ,方法的检出限为 1 .3 2× 1 0 - 1 1 g L,测定范围为 0～ 60 μg L。采用聚酰胺在盐酸或王水介质中分离富集样品中的钯 ,使方法的选择性大大提高。

A new catalytic spectrophotometric method has been developed for the determination of palladium. The method is based on the fact that trace of palladium(II) exerts a catalytic action on the oxidative decolorizing between beryllon II and sodium hypophosphite in H2SO4 medium. The detection limit is 1.32 x 10(-11) g/L, for Pd(II). The range of the determination of Pd(II) is 0 similar to 60 mug/L. Sample was dissolved in aqua regia and the palladium(II) was separated and enriched by polyamide. The method has been applied to the determination of trace palladium with satisfactory results.