Catalytic Spectrophotometric Determination of Rhodium in The Rhodium-Potassium Periodate-Ethylrhodamine B |
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| Authors: | LI Zu-Bi WANG Jialin DU Chao XU Qi-Heng |
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| Institution: | 1. Adult Education College, Yunnan Universily, Kunming, 650091, P. R. china;
2. Department of Chemistry, Yunnan University, Kunming, 650091, P. R, china |
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| Abstract: | The method of kinetic spectrophotometry for determination of trace Rh(Ⅲ) had been reported by reference. We have discovered that trace the Rh(Ⅲ) catalyze the decolorating oxidizine reaction of ethylrhodamine B by potassium periodate on heating in phosphoric acid and sodium chloride medium, the reaction rate on log(A0/A) values is linear over relatively range of concentration of Rh(Ⅲ). Hence a new catalytic spectrophotometric method for determination of trace Rh(Ⅲ) has been established. The method is simple,rapid and reproducible. The method has been used to determine trace Rh(Ⅲ) in actual samples with satisfactory results. |
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