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Determination of p Ka values of anthraquinone compounds by capillary electrophoresis
Author(s) -
Wang Dexian,
Yang Gengliang,
Song Xiurong
Publication year - 2001
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/1522-2683(200102)22:3<464::aid-elps464>3.0.co;2-4
Subject(s) - capillary electrophoresis , chemistry , acid dissociation constant , dissociation constant , anthraquinone , anthraquinones , electrophoresis , dissociation (chemistry) , chromatography , buffer solution , buffer (optical fiber) , analytical chemistry (journal) , organic chemistry , biochemistry , aqueous solution , telecommunications , botany , receptor , computer science , biology
In this paper, the dissociation constants (p K a 1 , p K a 2 ) of five anthraquinones were determined from the relation between the effective mobility at different pH values and the buffer pH value, which was derived from the basic electrophoresis theory and the dissociation equilibrium of a binary acid. In addition, the changes of p K a values of the five compounds were also investigated when organic modifiers were added to the buffer system.