Studies on Dual-beam Spectrometric Simultaneous Determination of Platinum and Rhodium with Water-Insoluble Porphine T(3-M-4HP)P

Abstract

Abstract: The optimal conditions for the complexation reaction of meso- tetra(3-methoxy-4-hy-droxyphenyl) porphine T(3-M-4HP)P with platinum and rhodium are presented. Beer's Law is obeyed when the concentration of rhodium is in the range of 0. 45～1.15 μg/25mL. The molar absorptivity of rhodium was found to be 1.99×10⁶ L·mol^-1·cm^-1 at 460 nm. The value of ε_Pt was found to be 6. 28×10⁵ L·mol^-1·cm^-1 by linear regression method. The K coefficient method and compensating coefficient were used to determine platinum and rhodium simultaneouly without removal or masking of the interferents in the sample. The results for the determination of platinum and rhodium in the mixed solution of platinum and rhodium are satisfactory.

Key words: Platinum, Rhodium, Spectrophotonletry, Meso-tetra(3-M-4HP)P.

Li Youfen, Zheng Yanzhi . Studies on Dual-beam Spectrometric Simultaneous Determination of Platinum and Rhodium with Water-Insoluble Porphine T(3-M-4HP)P[J]. Chemical Research in Chinese Universities, 1991, 7(2): 91-95.

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Studies on Dual-beam Spectrometric Simultaneous Determination of Platinum and Rhodium with Water-Insoluble Porphine T(3-M-4HP)P

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