Quantificação de acidez titulável e pH utilizando técnica potenciométrica como indicador de qualidade do leite bovino

Abstract

In this work we developed a methodology capable of measuring the acidity of cow´s milk in an accurate and practical way. Among the features of the proposed method and of the electronic circuit associated with it is the speed of analysis, low consumption energy, numerical precision of the results, portability, robustness at fieldwork and data storage capacity (internal memory). By means of an USB connection, the proposed equipment is capable of measuring the acidity values (in oD), pH, temperature, date and time of the analysis. In this way, it can be considered an important analytical instrument for monitoring the quality of milk at the time of collection on the farm. The proposed equipment is different from the traditional alizarol test by the fact that it provides a numeric result comparable to analytical measurements obtained with the reference method, which is the titratable acidity analysis in oD, made in the laboratory and with proper glassware.