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Please use this identifier to cite or link to this item: http://hdl.handle.net/10481/29099

Title: Measurement and interpretation of electrokinetic phenomena - (IUPAC technical report)
Authors: Delgado, Ángel V.
González Caballero, Fernando
Hunter, R. J.
Koopal, L. K.
Lyklema, J.
Issue Date: 2005
Abstract: 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 ζ-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 ζ-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 ζ-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 ζ-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.
Sponsorship: Financial assistance from IUPAC is gratefully acknowledged.
Publisher: International Union of Pure and Applied Chemistry
Keywords: Electrokinetics
Zeta potential
Aqueous systems
Surface conductivity
IUPAC Physical and Biophysical Chemistry Division
URI: http://hdl.handle.net/10481/29099
ISSN: 0033-4545
Rights : Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License
Citation: Delgado, A.V. Measurement and interpretation of electrokinetic phenomena - (IUPAC technical report). Pure and Applied Chemistry, 77(10): 1753-1805 (2005). [http://hdl.handle.net/10481/29099]
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