论文部分内容阅读
报道了以铑（Ⅲ）催化溴酸钾氧化偶氮氯膦pA为基础测定痕量铑的催化光度分析法，建立了一种在水相中直接测定痕量铑（Ⅲ）的新方法。铑（Ⅲ）含量在5~30μg/L范围内符合比耳定律，检出限为5μg/L，本法用于铂-铑催化剂中铑的测定，结果满意。
A catalytic spectrophotometric method for the determination of trace rhodium based on rhodium (Ⅲ) -catalyzed oxidation of chlorophosphonazo pA by potassium bromate was reported. A new method for the direct determination of trace rhodium (Ⅲ) in water was established. The content of rhodium (Ⅲ) conforms to Beer’s law in the range of 5 ~ 30μg / L with the detection limit of 5μg / L. The method is applied to the determination of rhodium in platinum-rhodium catalyst with satisfactory results.