Chemical and mycological evaluation of sweetened condensed and evaporated milks in Menofia governorate.

Dina, I. EL Zahaby and Nermeen, H. Ghazaly

Abstract

Fifty random samples of imported concentrated milk (25 each of sweetened condensed and evaporated milk) were collected from different supermarkets in Menofia Governorate for chemical and mycological examination. The mean values of total solids, fat, protein, sucrose contents and sugar/water ratio in the examined sweetened condensed milk samples were 29±0.31, 8.5±1.3, 7.9±1.1, 43±0.32 and 61.91±0.35, respectively. While, the mean values of total solids, fat and protein contents in examined evaporated milk samples were25.7±1.1, 8.5±0.23 and 7.1±1.0, respectively. Mold and yeast were detected in both sweetened condensed and evaporated milk. Aspergillus and Pencillium genera were frequently isolated than other genera of fungi. Aspergillus spp. were isolated with percentage of (32%) and (44%) from sweetened condensed and evaporated milk respectively. A. flavus was the most dominant spp.in the examined samples with percentage of (87.5%)and (27.5%) from sweetened and evaporated milk respectively. From yeast isolated the genus Saccharomyces was the most dominant in the contaminated sweetened condensed milk samples (40%), followed by Rhodotorula (12%), then genus Candida (8%).While from evaporated milk the isolated yeast were Rhodotorula, Candida, and Saccharomyces with percentage (12%), (8%)and (4%), respectively.

Key words

condensed milk, evaporated milk, mold, yeast