火焰原子吸收法测定铑的研究

采用火焰原子吸收法( FAAS)对溶液中铑(Rh)的含量进行分析，研究了释放剂、无机酸、共存金属等因素对铑测定的影响．结果表明，选用CuSO4-LaCl3体系作为释放剂，能有效提高测定铑的灵敏度，并能消除常见无机酸和多种共存金属离子的干扰，实验量为每5mLRh溶液加入5mg/mL CuSO4和5mg/mL LaCl3各1ml，加标回收率在99.85%～105.05%之间，释放剂添加量少，操作简便、快速、可靠．

DETERMINATION OF RHODIUM BY FLAME ATOMIC ABSORPTION SPECTROMETRY

The content of rhodium in solution was determined by the flame atomic absorption spectrometry method. This article studied different factors that influenced the determination of rhodium, including releasing agent, inorganic acid and coexistence metal ions. The result showed that the determination sensitivity of rhodium can be increased and the interference of inorganic acid and coexistence metal ions can be disappeared by adding CuSO4-LaCl3 as releasing agent. The experiments indicated that the adding amount for 5 ml rhodium solution was 1 ml each of CuSO4 and LaCl3 solutions (the concentrations were both 5 mg/ml). The recovery of standard addition ranged from 99.85% to 105.05%. The adding quantity of releasing agent in this paper is less than others. The method is simple, rapid and accurate.