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Ion transfer of barium and strontium across the liquid‐liquid interface facilitated by polyethylene glycol 400
Author(s) -
Sun Zhisheng,
Wang Erkang
Publication year - 1989
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140010511
Subject(s) - polyethylene glycol , selectivity , strontium , dissociation (chemistry) , barium , aqueous solution , liquid liquid , chemistry , ion , metal , mass transfer , metal ions in aqueous solution , inorganic chemistry , chemical engineering , materials science , chromatography , organic chemistry , engineering , catalysis
A mechanism of metal ion transfer for Ba 2+ and Sr 2+ at the liquid‐liquid interface, facilitated by polyethylene glycol 400 and based on complexation in aqueous and organic phases, is proposed. The interfacial half‐wave potential equations are deduced in terms both of the mechanism proposed and of the equilibria of distribution and dissociation in two phases and are verified experimentally. The effect of the polyoxyethylene structure on the selectivity of the facilitated transfer is discussed, and a useful way of improving the selectivity by selecting neutral carriers for practical analysis is suggested.