胶束增溶光度法同时测定铂、铑、钯和金的研究

Simultaneous Determination of Platinum, Rhodium, Palladium and Gold by Micellar Solubilization Spectrophotometry

本文研究了贵金属Pt、Rh、Pd和Au在SnCl_2-BRB-AG-乳化剂OP离子缔合物体系中显色反应的条件,采用偏最小二乘回归法对上述体系重迭光谱进行解析及数据处理。结果表明,该体系灵敏度高,表观摩尔吸光系数可达1.74×10～6～2.47×10～6L·mol～-1·cm～-1;体系稳定性较好。应用本文方法对混合试样中Pt、Rh、Pd、Au进行同时测定,取得较满意的结果。

The condition of colour reaction of noble metal Pt, Rh, Pd and Au with SnCl2-BRB-AG-OP has been studied. Using partial least-squares spectrophotometry, the overlapping problem of absorption spectrum in their associated complexes has been resolved, and they can be determined simultaneously with satisfactory results. The sensitivity is high, the molar absorptivity is 1. 74×106-2. 47×108 L · mol-1·cm-1.