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Pure and Applied Chemistry

The Scientific Journal of IUPAC

Ed. by Burrows, Hugh / Weir, Ron / Stohner, Jürgen

12 Issues per year

IMPACT FACTOR 2013: 3.112
Rank 41 out of 148 in category Multidisciplinary Chemistry in the 2013 Thomson Reuters Journal Citation Report/Science Edition

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Measurement and Interpretation of Electrokinetic Phenomena (IUPAC Technical Report)

A. V. Delgado1 / F. González-Caballero1 / R. J. Hunter2 / L. K. Koopal3 / J. Lyklema3

1University of Granada, Granada, Spain

2University of Sydney, Sydney, Australia

3Wageningen University, Wageningen, The Netherlands

Project Year: 2001, Project Code: 2001-035-1-100

Citation Information: Pure and Applied Chemistry. Volume 77, Issue 10, Pages 1753–1805, ISSN (Online) 1365-3075, ISSN (Print) 0033-4545, DOI: 10.1351/pac200577101753, January 2009

Publication History

Published Online:
2009-01-01

In this report, the status quo and recent progress in electrokinetics are reviewed. Practical rules are recommended for performing electrokinetic measurements and interpreting their results in terms of well-defined quantities, the most familiar being the z-potential or electrokinetic potential. This potential is a property of charged interfaces, and it should be independent of the technique used for its determination. However, often the z-potential is not the only property electrokinetically characterizing the electrical state of the interfacial region; the excess conductivity of the stagnant layer is an additional parameter. The requirement to obtain the z-potential is that electrokinetic theories be correctly used and applied within their range of validity. Basic theories and their application ranges are discussed. A thorough description of the main electrokinetic methods is given; special attention is paid to their ranges of applicability as well as to the validity of the underlying theoretical models. Electrokinetic consistency tests are proposed in order to assess the validity of the z-potentials obtained. The recommendations given in the report apply mainly to smooth and homogeneous solid particles and plugs in aqueous systems; some attention is paid to nonaqueous media and less ideal surfaces.

Keywords: aqueous systems; conductivity; Electrokinetics; IUPAC Physical and Biophysical Chemistry Division; surface conductivity; zeta potential

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