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A Simple Expression for the Electrophoretic Mobility of Charged Mercury Drops

✍ Scribed by Hiroyuki Ohshima

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
121 KB
Volume
189
Category
Article
ISSN
0021-9797

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✦ Synopsis

NOTE

A Simple Expression for the Electrophoretic Mobility of Charged Mercury Drops calculations since numerical calculations of the exponential integrals are required and, especially for large ka, the second and third terms on the A simple approximate expression for the electrophoretic mobilright-hand side of Eq. [1] become very large, giving rise to large cancellation ity of charged spherical mercury drops is derived which is applicaerrors.

ble for low zeta potentials and all ka (k is the Debye-Hu Β¨ckel

In the following, we derive a simple mobility formula which does not parameter and a is the particle radius) with relative errors of less involve this inconvenience and is applicable for all values of ka with relative than 1%. α­§ 1997 Academic Press errors of less than 1%. Consider a spherical mercury drop moving with a

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An approximate analytic expression for the electrophoretic mobility of a spherical colloidal particle in a symmetrical electrolyte solution is obtained. This mobility expression, which is correct to the order of the third power of the ΞΆ-potential of the particle, considerably improves Henry's mobili