Method for determining particle size and/or distribution

Details Method for determining particle size and/or distribution Method for determining particle size and/or distribution

1986-08-25

1987-10-13

Levy, Stewart J.

Measuring and testing

Particle size

G01N 1500

Patent

active

046990151

ABSTRACT:
There is provided an improved method for particle size and distribution determinations using a photosedimentometer having a centrifugal disc chamber for containing a spin fluid. The spin fluid must be characterized by a density gradient. The present process provides a novel way of composing the spin fluid. The less dense component water/alcohol is introduced first, and the more dense component (e.g., water) is introduced second. At no time is the power to the motor driving the disc interrupted as in prior art methods. Better and more reproducible results are secured.

REFERENCES:
patent: 3475968 (1969-11-01), Jones
patent: 4311039 (1982-01-01), Koehler et al.
patent: 4478073 (1984-10-01), Holsworth et al.

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