Particle size probe for silver halide emulsion

Details Particle size probe for silver halide emulsion Particle size probe for silver halide emulsion

1994-01-14

1995-09-05

Wieder, Kenneth A.

Electricity: measuring and testing

Determining nonelectric properties by measuring electric...

324 72, 430 30, 430567, 430569, G01N 2700

Patent

active

054481600

ABSTRACT:
The present invention concerns a method and apparatus for determining average particle size of silver halide grains in a solution or emulsion containing silver ions and excess halide ions. The potential of the silver ion in solution (E.sub.d) is measured using a silver electrode and the potential of the silver ion in solution with infinitely large silver halide particles (E.sub.e) is measured using a silver electrode coated with silver halide. The molecular volume (v) of the solute is calculated and the average particle size (d) is calculated from the following formula: ##EQU1## wherein F is the Faraday constant and (s) is the surface energy of the average particle size per unit area.

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