Table 1.

Effective charge of an isolated colloid from a fit to the DLVO potential for the numerical solution and the analytical approximation

$x/{\lambda }_{\text{D}}$	$Z_{\text{eff}}$ (IPBS)	$Z_{\text{eff}}$ (analytical)	Relative deviation (%)
5/3	$238.5\pm 0.1$	241.4	1.1
3/3	$202.0\pm 0.5$	208.0	2.8
1/3	$99.4\pm 1.0$	87.2	13.9