E. Bottari, M. R. Festa
1999
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Journal
Chemical Speciation and Bioavailability
Abstract
AbstractThe protonation of glycocholate (GC−) and glycodeoxycholate (GDC−) ions was studied at 25°C and in N(CH3)4Cl as an ionic medium at concentrations 0.100, 0.500 and 0.800 mol L−1 by measuring the electromotive force of a galvanic cell containing a glass electrode, as a function of acidity of solution. Also the solubility of glycocholic and glycodeoxycholic acids was determined in the same experimental conditions. The protonation constants of GC− and GDC− were determined and it was found that a further protonation of HGC occurs by increasing acidity. Its protonation constant was also determined.