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Anionenwirkung auf CaNa‐Gleichgewichte an Kationenaustauschern. 9. Mitteilung über Ionenaustauscher
Author(s) -
Deuel H.,
Hutschneker K.,
Stutz E.,
Frederiks J. C.
Publication year - 1957
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19570400702
Subject(s) - chemistry , ethylenediamine , selectivity , ion exchange , inorganic chemistry , ion , medicinal chemistry , nuclear chemistry , catalysis , organic chemistry
Ca 2+ Na + exchange equilibria between Dowex 50 or cross‐linked pectic acid as cation exchangers and external solutions with different anions have been measured. The Ca 2+ selectivity of the exchangers is decreased by the anions in the following order: acetate, β‐indolyl acetate, citrate. Under not to acidic conditions ethylenediamine tetraacetate removes more Ca 2+ from the exchanger than the other anions. S‐shaped equilibrium curves are obtained with ethylenediamine tetraacetate, showing the bifunctionality of this anion towards Ca 2+ .