Potential drop across the mobile part of the double layer, that is responsible for
electrokinetic phenomena.
is positive if the potential increases from the bulk of the liquid phase towards
the
interface. In calculating the electrokinetic potential from electrokinetic phenomena it is
often asumed that the liquid adhering to the solid wall and the mobile liquid are
separated by a sharp shear plane. As long as there is no reliable information on the
values of the
permittivity and the
viscosity in the electrical double layer close to the
interface, the calculation of the electrokinetic potential from electrokinetic experiments
remains open to criticism. It is therefore essential to indicate in all cases which
equations have been used in the calculation of
. It can be shown, however, that for the same assumptions about the
permittivity and
viscosity all electrokinetic phenomena must give the same value for the electrokinetic potential.
Source:
PAC, 1996, 68, 957
(Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations
1996))
on page 971
PAC, 1994, 66, 891
(Quantities and units for electrophoresis in the clinical laboratory (IUPAC Recommendations
1994))
on page 894
