Numerical calculation of the electrophoretic mobility of a spherical particle in a salt-free medium

2003 ◽  
Vol 262 (1) ◽  
pp. 294-297 ◽  
Author(s):  
Hiroyuki Ohshima
Keyword(s):  
Numerical Calculation ◽  
Spherical Particle ◽  
Electrophoretic Mobility ◽  
Free Medium

The electrophoretic mobility of large colloidal particles

1981 ◽  
Vol 59 (13) ◽  
pp. 1878-1887 ◽  
Author(s):  
Richard Wyndham O'Brien ◽  
Robert John Hunter
Keyword(s):  
Spherical Particle ◽  
Electrophoretic Mobility ◽  
Double Layer ◽  
Reliable Method ◽  
Colloidal Particles ◽  
Analytical Approximation ◽  
Large Spherical Particle ◽  
Computer Calculations ◽  
Complicated Nature ◽  
Large Spherical

Analytical approximation formulae linking ζ potential and electrophoretic mobility have been derived for a variety of limiting conditions. In this paper we present a simplified derivation of an equation first established by Dukhin and his collaborators for a large spherical particle with a thin double layer. Although potentially a very useful expression it has been little used to date, partly because of the complicated nature of Dukhin's derivation and partly because of the lack of a reliable method of testing its validity. The expression compares very favourably with the computer calculations of O'Brien and White, provided κa is sufficiently large.

Sign in / Sign up

Export Citation Format

Share Document