Original scientific paper

https://doi.org/10.5562/cca2062

Potentiometric Titrations as a Tool for Surface Charge Determination

Johannes Lützenkirchen orcid.org/0000-0002-0611-2746 ; Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology (KIT), P.O. Box 3640, DE-76021 Karlsruhe, Germany
Tajana Preočanin ; Division of Physical Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, HR-10000 Zagreb, Croatia
Davor Kovačević ; Division of Physical Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, HR-10000 Zagreb, Croatia
Vladislav Tomišić ; Division of Physical Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, HR-10000 Zagreb, Croatia
Lars Lövgren ; Department of Chemistry, University of Umeå, SE-901 87 Umeå, Sweden
Nikola Kallay ; Division of Physical Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, HR-10000 Zagreb, Croatia

Abstract

This article summarizes methods for determining proton surface charge at mineral/water interfaces.
It covers conventional experimental procedures and discusses problems with the techniques. Also it
involves recommendations for obtaining reasonable and comparable results. The term "comparable results"
refers to comparison between results for the same solid as obtained in different laboratories. The
most important parameters for the surface titrations are discussed. We also propose a reference titration
procedure that would allow direct, unbiased comparisons of experimental data. The article finally includes
a check-list for researchers and reviewers which should allow limiting the amount of titration data that are
not useful for future uses. (doi: 10.5562/cca2062)

Keywords

surface charge; potentiometric titration; surface reaction; pH measurement

Hrčak ID:

93727

URI

https://hrcak.srce.hr/93727

Publication date:

17.12.2012.

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