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报道了以铑(Ⅲ)催化溴酸钾氧化二溴硝基偶氮氯膦的褪色反应,建立了一种在水相中直接测定微量铑的催化光度分析法.铑含量在0.0～12.0μg·L-1范围内符合比耳定律.用于铂铑催化剂中铑的测定,结果满意.
A catalytic spectrophotometric method was developed for the direct determination of trace rhodium in water with rhodium (Ⅲ) -catalyzed oxidation of dibromonitrochlorophosphonazobromophosphoric acid by potassium bromate. The rhodium content was in the range of 0.0 ~ 12.0μg · L- 1 in line with the Beer’s law for the determination of rhodium platinum catalyst, the results were satisfactory.