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Abstract
Emulsions prepared with an inert gelatin have been sensitized with sodium thiosulphate labelled with radioactive 35S. An analytical technique similar to that used by Frieser and Ranz1 has been used to measure the amounts of silver sulphide formed. The breakdown of thiosulphate has been shown to follow first order reaction kinetics at a rate proportional to the free silver ion concentration in the emulsion to the power of 0.8.