Chemometric Algorithms for the Monitoring of Milk Quality by Potentiometric Titration
The acute problem in the analysis of dairy products is the potentiometric determination of the active and total titrated acidity of pasteurized milk from different manufacturers and their comparison with those for raw cow milk. In addition, for various expert purposes, fast definition of the manufacturer of this product is necessary. The conditions of potentiometric titration of pasteurized milk are specified. It is shown that the total acidity of pasteurized milk produced by different manufacturers differs insignificantly. Therefore, for modelling potentiometric titration curves of milk samples ICA and PCA methods were applied. ICA surpasses PCA in terms of reliability of class separation. ICA method solved the classification problem of assigning milk samples to a specific manufacturer, similarity with raw cow milk samples, as well as detecting products made from different raw materials or using different technologies.