A new technique of derivative thermal monitoring of calcium orthophosphate - a food preservative - in a binary system.

The preservative and nutritional qualities of calcium orthophosphate
(TCP) has been previously reported. However, its protective use in processed
foods and flour is mainly based on the purity of the salt. Most of
the commercial salts screened were found to contain dicalcium orthophosphate
as an impurity which is beneficial to insect breeding. A new
quantitative method has been described for the estimation of TCP content
in a binary phosphate system. The method is based on monitoring
the solid phase decomposition of two salts under a controlled thermal
environment. A unique technique of measuring the intermediary decomposition
phase and estimating the adulterant in TCP is described and
the thermal reactions are discussed