Izvestiya of Saratov University.

Chemistry. Biology. Ecology

ISSN 1816-9775 (Print)
ISSN 2541-8971 (Online)
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Language: 
Russian
Heading: 
Chemistry
Article type: 
Article
UDC: 
543.42
DOI: 
10.18500/1816-9775-2019-19-4-387-395

Chemometric Algorithms for the Monitoring of Milk Quality by Potentiometric Titration

Autors: 
Monakhova Yu. B., Saratov State University
Kuznetsova Irina V., Saratov State University
Abstract: 

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.

Key words: 
chemometric modelling
active acidity
total acidity
raw cow milk
pasteurized milk
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