【摘要】 在酸性介质中,痕量Rh(Ⅲ)的存在对KBrO3 氧化二溴对甲偶氮羧的褪色反应有明显的催化作用.据此褪色反应建立了测定痕量铑的动力学催化光度分析方法.铑检出限为 0.001μg·mL-1,在 0.002~0.050μg·mL-1范围内符合比耳定律.反应在水相中进行,重现性好,用于铂 铑催化剂中铑的测定,结果满意.更多还原

【Abstract】 A new catalytic spectrphotometric method for the determination of Rhodium（Ⅲ） has been established on the catalytic action of Rh（Ⅲ） on the oxidative fading chlorophosphonazo with KBrO₃ in acid medium.The method offers the advantages of simplicity,rapidity and sensitivity.Beer’s law is obeyed from 0.002 to 0.050μg·mL^-1 and the determination limit is 0.001μg·mL^-1.The catalytic reaction occurs in water phase.This method has been used to determine Rh in platinum-rhodium catalyst with satisfactory results.更多还原