Polarographic Studies of Uranyl-Fumarate Complex in Dimethyl Sulfoxide Solution
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概要
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The polarographic behaviours of uranyl-dimethyl sulfoxide and uranyl-fumarate-dimethyl sulfoxide systems were studied at 30°C. For the former system, the complex species of UO2Dm+2, UO2(Dm)2+2 and UO2(Dm)4+2 were identified. For the latter system, the existences of (UO2)2 (HFu)2Dm+2, UO2(HFu)(Dm)2+1 and UO2Fu(Dm)2 were confirmed and their electrode reactions were established.The poor solubility of the chelating agent in water medium is an obstacle to the polarographic studies of metal chelates. Various kinds of non-aqueous media, there-fore, have been used to substitute water solution. Among them dimethyl sulfoxide has recently come to be widely used as an advantageous medium.The polarographic behaviours of lanthanides and thorium in dimethyl sulfoxide were studied, respectively, by Gritzner et al. and Sancho and co-workers. Some uranyl complexes with dimethyl sulfoxide have been prepared.In the present paper the reduction of uranyl ion in various concentration of dimethyl sulfoxide at dropping mercury electrode was first carried out, and then a further polaro-graphic study of uranyl-fumarate system in dimethyl sulfoxide solution was made.
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