Studies of the Alkaline Earth Complexes in Various Solutions. V. Calcium(II) and Strontium(II) Complexes with Carbonate Ions in 1M Sodium Chloride Media
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概要
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The complex formation of calcium(II) and strontium(II) with carbonate ions in 1M sodium chloride media at 25°C has been determined by a liquid-liquid distribution method. The metal ions in the aqueous phase were extracted with a mixture of benzoylacetone and tributylphosphate in hexane as adduct chelate complexes. The distribution ratio was determined by radiometry as a function of the carbonate-ion concentration in the aqueous phase. The decrease in the metal distribution caused by the addition of carbonate ions to the aqueous phase has been explained in terms of the complex formation, and the stability constants have been determined from these data by a "curve-fitting" method. It has been concluded from the results that the stabilities of these complexes are about the same magnitude of those of the sulfate complexes of these metal ions and that the concentration of the carbonate complexes in usual natural waters is probably negligibly small.
- 公益社団法人 日本化学会の論文
著者
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Kawashima Hiroshi
Department Of Agricultural Chemistry Faculty Of Agriculture Kyoto University:institute For Biomedica
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Sekine Tatsuya
Department Of Applied Chemistry Kanagawa Institute Of Technology
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HASEGAWA Yuko
Department of Bioresources Science, Faculty of Agriculture, Kochi University
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Sekine Tatsuya
Departemnt of Chemistry, Science University of Tokyo
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