Zeta-potential determining apparatus

Details Zeta-potential determining apparatus Zeta-potential determining apparatus

1997-09-29

2000-04-18

Warden, Jill

Chemistry: electrical and wave energy

Apparatus

Electrophoretic or electro-osmotic apparatus

G01N 2726

Patent

active

060511249

ABSTRACT:
A zeta-potential determining apparatus that determines accurately a zeta potential of a solution with a tendency to generate bubbles due to an applied electric field. This apparatus includes a cell member having a cavity, and positive and negative electrodes located in the cavity. The cell member further has first and second bubble-barrier membranes in vicinities of the positive and negative electrodes. Each of the first and second bubble-barrier membranes blocks bubbles generated in the solution in the vicinity of the corresponding electrodes. Each of the first and second bubble-barrier membranes also allows ions contained in the solution to penetrate therethrough. In use, a dc voltage is applied across the positive and negative electrodes. A solution containing charged monitor particles is supplied and stored in the cavity of the cell member.

REFERENCES:
patent: 4219395 (1980-08-01), Smith et al.
patent: 4617104 (1986-10-01), Kawai et al.
patent: 5358618 (1994-10-01), Ewing et al.
Pp. 205 and 520 of Webster's II New Riverside University Dictionary, 1994.
Cole et al. ("Free-solution electrophoresis of proteins in an improved density gradient column and by capillary electrophoresis", J. Chromatogr. A 707 (1995) Month Unknown 77-85).
F. Kitahara et al., "Various Measuring Method of Zeta Electric Potential", pp. 52-53 and 68-71, Zeta Electronic Potential, 1995 Month Unknown (with English Abstract).

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