Storage temperature of pasteurized milk traded by supermarkets in Curitiba, Paraná
DOI:
https://doi.org/10.3395/2317-269x.00276Keywords:
Acidity, Coliforms, Alkaline Phosphatase, QualityAbstract
Pasteurized milk is a perishable food; hence, when produced and stored without proper hygiene and conservation protocols, it loses its quality. The present study aimed to evaluate the storage temperature of pasteurized milk sold in supermarkets in the city of Curitiba, Paraná, as well as its influence on product quality. The temperature of the samples was measured directly on the supermarket shelves (n = 50). In the same stores, 20 pasteurized milk samples were randomly collected for further analysis of coliform count at 45ºC, alkaline phosphatase proof, and determination of titratable acidity. Eight samples (16%) were stored at temperatures above 10ºC and 27 samples (54%) between 7 and 10ºC. According to Brazilian legislation, 7 samples (35%) had coliforms counts exceeding the standard value and 8 samples (40%) had acidity above the maximum established level; nevertheless, all samples were in compliance with the alkaline phosphatase proof. Storage temperature showed significant positive correlation with acidity (r = 0.322, p = 0.017) and coliform count (r = 0.509, p = 0.022). These results indicate that inadequate storage temperature at trading points contributes to the quality mitigation of pasteurized milk.Downloads
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