Title:
A DEVICE FOR DETERMINING THE SIZE AND CHARGE OF COLLOIDAL PARTICLES
Document Type and Number:
WIPO Patent Application WO1993004363
Kind Code:
A3
Abstract:
An apparatus for determining the particle charge and size distribution of particles in suspensions of arbitrary concentration is provided. The apparatus includes a cell for application of an unsteady electric field or an unsteady mechanical force across the suspension of at least two different frequencies for accelerating the particles. The resulting acoustic wave generated by application of the electric field applied to the electrodes, or the electrical response and the acoustic pressure at the electrodes generated by application of the mechanical force is measured. Transducers convert the mechanical forces to electrical forces.
Inventors:
CANNON DAVID W (US)
O'BRIEN RICHARD WYNDHAM (US)
O'BRIEN RICHARD WYNDHAM (US)
Application Number:
PCT/US1992/007353
Publication Date:
April 15, 1993
Filing Date:
August 21, 1992
Export Citation:
Assignee:
MATEC APPLIED SCIENCES INC (US)
COLLOICAL DYNAMICS PTY LTD (US)
COLLOICAL DYNAMICS PTY LTD (US)
International Classes:
G01N29/02; G01N29/34; (IPC1-7): G01N29/02; G01N15/02
Domestic Patent References:
| WO1988002482A1 | 1988-04-07 |
Foreign References:
| EP0129766A2 | 1985-01-02 |
Other References:
COLLOIDS AND SURFACES vol. 46, no. 2-4, 1990, ELSEVIER SCIENCE PUBLISHERS B.V. pages 177 - 192 E.E. ISAAC ET AL. 'ELECTROACOUSTIC METHOD FOR MONITORING THE COALESCENCE OF WATER-IN-PIL EMULSIONS'
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