胶束增溶-偏最小二乘光度法测定金、钯、铑的研究

The Study on Simultaneous Determination of Gold, Rhodium and Palladium with Micellar Solubilization -Partial Least Squares Regression Spectrophotometry

采用胶束增溶－偏最小二乘光度法在ＳｎＣｌ２－ＲＢ－ＡＧ离子缔合物体系中，对Ａｕ、Ｐｄ、Ｒｈ同时测定进行了研究·结果表明，该体系的灵敏度高，其εｍａｘ在６．９３×１０５～１．４０×１０６；相对标准偏差在０．４５％～０．４８％；混合样品分析的相对误差一般都小于１０％；方法简便，稳定性也较好。

The condition of colour reaction of noble metal Au,Rh,Pd with SnCl 2 -RB-AG has been studied,using the method of partial least-squares regression spectro photo metriy.The problem of interference among ion associated absorption spectrum of Au、Rh、Pd、has been resolved and they can be determined simultareausly.This system has a high seusitivity.The apparent malar absorptivity is 6.93×10 5～1.4×10 6L·mol -1 ·cm -1 relative standard deviation is 0.45%～0.48%,limit of detection is 0.293～1.072ng/mL,and relative error for the mixed spmples are less,than 10%.The results are satisfactry.