SORBIC ACID STABILITY DURING PROCESSING and STORAGE OF AN INTERMEDIATE MOISTURE CHEESE ANALOG

Abstract
The chemical stability of sorbic acid during processing and storage of intermediate moisture foods was determined using a soybean based cheese analog. Samples prepared with 0.57 to 4.24% homogeneously distributed K-sorbate showed losses of less than 25% after 40 days storage at 35°C, 88% RH air and in the dark. Heating (2 h in an 85°C water bath) resulted in no significant sorbic acid losses. Samples with surface applications of 1 mg sorbic acid/cm2 showed no detectable losses after 10 days storage under the same conditions. Furthermore, the stability of the preservative was not affected by growth of Staphylococcus aureus S-6.

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