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A Study on the Determination of Mn(Ⅱ) with Solvent Flotation Ternary Complex Spectrophotometry

YAN Yong-sheng 1, QIN Yong-chao 2, LU Xiao-hua 1 (1. Department of Environmental Science and Engineering, Huazhong University of Science & Technology, Wuhan, 430074; 2. Department of Chemistry, Wuhan University, Wuhan, 430072)  
This article introduces a new solvent flotation spectrophotometry for the determination of Mn (Ⅱ) with ternary complex of Mn (Ⅱ)-Phen-TIF flotation in benzene by N 2. Its principle is that Mn (Ⅱ) can react with Phen to form [Mn(Phen) 3] 2+ in alkali condition (pH=9.5), and then [Mn(Phen) 3] 2+ reacts with TIF to form stable associate in organic solvent benzene. The method shows high sensitivity (ε=9.6×10 5 L·mol -1·cm -1) . The practical determination results of Mn (Ⅱ) in natural water and alcohol are satisfactory.
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