Optimising water activity for storage of high lipid and high protein infant formula milk powder using multivariate analysis

Hong Cheng, Henriette Erichsen, John Soerensen, Mikael Agerlin Petersen, Leif H. Skibsted*

*Corresponding author for this work
    7 Citations (Scopus)

    Abstract

    High lipid and high protein infant formula milk powders were stored at water activity of 0.11, 0.33 and 0.53 for up to fourteen weeks at 40 °C to investigate the effect of storage water activity on physicochemical properties and formation of volatiles to thereby recommend optimal storage water activity conditions. Water activity of the powders was determined during storage together with surface colour, glass transition temperature combined with dynamic headspace sampling followed by gas chromatography/mass spectrometry. The principal component analysis (PCA) showed that the optimal water activity for storage of high lipid infant formula milk powder, for which lipid oxidation was found to be the critical quality parameter, is a w = 0.33 with lowest lipid oxidation, while for high protein infant formula milk powder, for which protein degradation was found to be the critical quality parameter, a w = 0.11 is optimal to limit formation of Maillard reaction products.

    Original languageEnglish
    JournalInternational Dairy Journal
    Volume93
    Pages (from-to)92-98
    Number of pages7
    ISSN0958-6946
    DOIs
    Publication statusPublished - 2019

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