Spektralphotometrische Analyse von mehrstufigen Protolyse-Gleichgewichten über einheitliche Teilbereiche / Spectrophotometric Analysis of Multistep Protolyte-Equilibria by Means of Uniform Segments
Open Access
- 1 December 1974
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 29 (11-12) , 734-741
- https://doi.org/10.1515/znb-1974-11-1209
Abstract
A method to analyze spectrophotometric titrations of one-step dissociation-equilibria is applied to titrations of polyelectrolytes with small pK-differences. As criteria for the spectrophotometric uniformity, absorbance and absorbance-difference-quotient diagrams are referred to. By means of these methods otherwise not determinable absorbance coefficients and pK-values of the uniform parts of the titration can be determined. The methods are demonstrated using the titration of o-phthalic acid and (1,2,4)-benzenetricarboxylic acid.Keywords
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