Qualidade microbiológica e físico-química de leites ultrapasteurizados desnatados e semidesnatados disponíveis no comércio de Dois Vizinhos - PR

Abstract

The Southwest state of Paraná has been increasing in milk production, with the modernization of the properties and the incentive marketing milk production, seeking greater production efficiency and quality of raw material. Based on this fact, this study aimed to analyze the physicochemical and microbiological characteristics of various brands of nonfat milk and ultra high temperature seminon fatmarketed in the city of Dois Vizinhos, in order to verify that they are fraud-free, safe for consumption and in accordance with the law. The following physicochemical characteristics were analyzed: pH, treatable acidity, protein, lactose, fat, nonfat solids, nonfat dry extract, fraud by addition of hydrogen peroxide and water. Such determinations were made in milk analyzer (Lactoscan SLP), and the total acidity and the addition of peroxide will followed the methodology laid down by law. Microbiological analyzes involved the total count of mesospheric aerobes, psychotropic and sporulated microorganisms, following the methodology proposed by the legislation. Through this study, it was verified that all milk brands analyzed were in disagreement with one or more physicochemical parameters provided by the legislation, and microbiological analyzes indicate that there are flaws in the commercial sterilization process of the product.