Optical process and apparatus for determining particle size of c

Details Optical process and apparatus for determining particle size of c Optical process and apparatus for determining particle size of c

1979-07-19

1981-06-23

Corbin, John K.

Optics: measuring and testing

For size of particles

By particle light scattering

G01N 1502

Patent

active

042747406

ABSTRACT:
Method and apparatus for determining the colloid size of particles in a colloidal solution include the use of a wedge-shaped container for a sample of the colloidal solution. The container is moved in the direction of the wedge shape perpendicular to the path of a light beam to produce a measured sample thickness of the colloidal solution. Due to the Tyndall effect, the measured sample thickness is a function of the scattering of the light beam. A lens arranged between the sample holder and a dispersion prism directs the beam of light emerging from the sample holder to the prism for dispersion and impingement upon an image screen. The sample holder is moved until only red light appears on the image screen. The thickness of the light path through the sample is measured and the particle size is computed according to an equation.

REFERENCES:
Barrow, Gordon M., Physical Chemistry, McGraw-Hill, New York, 1961, pp. 662-669.

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