Method and apparatus for measuring a colloidal potential

Details Method and apparatus for measuring a colloidal potential Method and apparatus for measuring a colloidal potential

1984-05-21

1985-11-12

Birmiel, Howard A.

Measuring and testing

Vibration

By mechanical waves

73590, 162198, 162263, D21F 706, D21F 1100, G01N 2726, G01N 2900

Patent

active

045520194

ABSTRACT:
A method and apparatus for measuring a colloidal potential are described using pulses of ultrasonic energy that are directed along a path within a liquid suspension of colloidal particles. A vibration potential is measured at at least a pair of positions along the path. The positions are known relative to the source of ultrasonic pulses. The vibration potential measurements are then used to derive a colloidal potential which is independent of its attenuation encountered by the ultrasonic energy inside the suspension. In one embodiment several potential measuring probes are used and in another embodiment one probe is moved between predetermined positions.

REFERENCES:
patent: 4294656 (1981-10-01), Beck et al.
patent: 4497208 (1985-02-01), Oja et al.

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