TABLE II.

Measured zeta potentials and surface charge densities for various solutions.

Solution	Zeta potential (mV)	Surface charge density (mC·m−2)
0.5 mM KCl	−56.9	−3.57
0.5 mM NaCl	−54.3	−3.35
0.5 mM CaCl2	−30.6	−3.84