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钯、铑二元素于HAc-NaAc缓冲介质中,在表面活性剂Triton X-100存在下与5-Br-PADAP形成灵敏度较高的紫红色络合物,其摩尔吸光系数分别为ε_(565)~(Pd)=1.44×10~5,ε_(562)~(Rh)=1.17×10~5(L·mol~(-1)·cm~(-1))。二元素络合物吸收光谱发生严重重叠。本文探讨了在上述体系中同时测定Pd、Rh的最佳条件,并采用迭代目标转换因子分析法(ITTFA)对Pd、Rh混合物合成样品进行同时测定。
Palladium and rhodium in the HAc-NaAc buffer medium, forming a purple-red complex with 5-Br-PADAP in the presence of the surfactant Triton X-100, the molar absorptivities were ε 565, ~ (Pd) = 1.44 × 10 ~ 5, ε_ (562) ~ (Rh) = 1.17 × 10 ~ 5 (L · mol -1 cm -1). Absorption spectra of two elemental complexes overlap seriously. In this paper, the optimal conditions for the simultaneous determination of Pd and Rh in the above system were explored. Simultaneous determination of Pd and Rh mixtures by iterative target conversion factor analysis (ITTFA) was carried out.