Measurement and interpretation of electrokinetic phenomena
Measurement and interpretation of electrokinetic phenomena
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DOI：
10.1016/j.jcis.2006.12.075
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发表时间：
2007-05-15
影响因子：
9.9
通讯作者：
Lyklema, J.
中科院分区：
文献类型：
--
作者：
Delgado, A. V.;Gonzalez-Caballero, F.;Lyklema, J.
本文综述了电动力学的研究现状和最新进展。建议使用实用规则进行电动测量，并根据明确定义的量解释其结果，最常见的是zeta电位或电动电位。该电位是带电界面的一种特性，它应该与用于测定的技术无关。然而，zeta电位通常不是表征界面区域电状态的唯一电动特性;停滞层的过量电导率是一个附加参数。获得zeta电位的要求是正确使用电动力学理论，并在其有效范围内应用。讨论了它们的基本理论和应用范围。主要的电动方法进行了彻底的描述，特别注意其适用范围以及基本理论模型的有效性。电动一致性测试提出，以评估所获得的zeta电位的有效性。该报告中给出的建议主要适用于光滑和均匀的固体颗粒和水系统中的塞子;对非水介质和不太理想的表面给予了一些注意。(C)2005年国际化联。
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 zeta-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 zeta-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 zeta-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 zeta-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. (C) 2005 IUPAC.