Method of measuring the mobility of colloids in an electrical fi

Details Method of measuring the mobility of colloids in an electrical fi Method of measuring the mobility of colloids in an electrical fi

1975-08-19

1978-09-12

Prescott, Arthur C.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204299R, 210 42R, 356103, G01N 2726, G01N 2728

Patent

active

041135962

ABSTRACT:
The invention relates to a method for the measurement of the movement of colloidal particles in suspensions or solutions. The apparatus used in this method comprises an electrophoresis tank equipped with two electrodes between which an electrical field can be applied.
A beam of radiation produced at the outside of the tank having a thickness of not more than 1000.mu. as viewed in the direction of the lines of force of the electrical field set up between the electrodes is directed so as to skim the electrode away from which the particles move under the effect of the electrical field.
In order to determine the mobility of the particles the optical density of the liquid is measured a first time without applying the electrical field, and a second time after having applied the field during not more than 10 seconds.

REFERENCES:
patent: 2749293 (1956-06-01), Wahlin
patent: 3346478 (1967-10-01), Widemann
patent: 3454487 (1969-07-01), Riddick
patent: 3764512 (1973-10-01), Greenwood et al.
patent: 3783117 (1974-01-01), Bean
patent: 3909380 (1975-09-01), Day et al.
Willard et al., "Instrumental Methods of Analysis", D. van Nostrand Co., Inc., pp. 20, 22 & 23, (1951).

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