Use of NMR Spectroscopy in the Study of Ion Exchange Systems
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概要
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The <SUP>31</SUP>P NMR chemical shift of phosphinate ion (PH<SUB>2</SUB>O<SUB>2</SUB><SUP>-</SUP>) is highly sensitive to the concentration of tetramethylammonium cation. Phosphinate ion was therefore taken as a generic probe species to explore the invasion of the non-exchange electrolyte (tetramethylammonium phosphinate) into tertamethylaznmonium form resin (AG 50W-X1, 50W-X2 and 50W-X4) and gel (SP Sephadex C-25) type cation exchangers. By making use of the mass balance and the Donnan equations the ionic composition of the exchanger phases was calculated as a function of concentration of the non-exchange electrolyte (0.025-1 M) .
- 日本イオン交換学会の論文
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