Concentração de minerais (sódio, ferro e magnésio), densidade, acidez e crioscopia em leites tipo UHT, comercializados em Ponta Grossa - PR

Abstract

The objective of this study was to analyze eight brands of UHT (Ultra Hight Temperature) type milk and the milk samples were collected and consumed in the region of Ponta Grossa-PR. The determination of the amount of minerals present in the milk as sodium, iron and magnesium, as well as some analyzes of the physical and chemical properties to which the milk is submitted in the industrialization process, such as density, cryoscopic index and acidity, part of the tests milk to ensure quality. These analyzes were carried out in order to determine whether the milks were within the current standards and consequently within the quality standards for the consumer. Another study was the correlation between the sodium values and the cited physical-chemical analyzes. In this study, the mineral content was determined using the Atomic Absorption Spectrometry method, the density with the aid of a thermolotometer, the cryoscopic index using the cryoscope and the acidity was determined by titration. For the mineral content, a statistical study of the analysis was performed through the SASM-Agri program. With the accomplishment of all the mentioned tests it was possible to determine that in general the results were within the required by norm, however for the cryoscopic index, some analyzes were out of the allowed. It was possible to obtain an association between sodium content with density and cryoscopy; however for the acidity this association could not be accurately performed. And the static study showed a relevant differentiation for the iron and sodium samples, which were consistent with what was expected with this study.