Optimising water activity for storage of high lipid and high protein infant formula milk powder using multivariate analysis |
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| Affiliation: | 1. College of Biology Science and Engineering, Hebei University of Economics and Business, No.47 Xuefu Road, Shijiazhuang 050061, China;2. Arla Foods R&D, Arla Foods, Rørdrumvej 2, DK-8220 Brabrand, Denmark;3. Department of Food Science, University of Copenhagen, Rolighedsvej 30, DK-1958 Frederiksberg C, Denmark;1. Department of Food Science, College of Light Industry, Liaoning University, Liaoning Engineering Research Center for Food Bioprocessing, Shenyang Key Laboratory of Food Bioprocessing and Quality Control, Shenyang 110036, China;2. Department of Chemistry, Renmin University of China, Beijing, 100872, China;3. College of Bioengineering, Sichuan University of Science & Engineering, Zigong, 643000, China;4. Arla Foods R&D, Arla Foods Amba, Agro Food Park 19, DK-8200 Aarhus N, Denmark;5. Department of Food Science, University of Copenhagen, Rolighedsvej 30, DK-1958 Frederiksberg C, Denmark;1. College of Engineering, China Agricultural University, Beijing, 100083, China;2. Agricultural Products Processing Center, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China;3. Division of Physiology, Biochemistry and Post-Harvest Technology, ICAR-Central Plantation Crops Research Institute, Kasaragod, 671124, Kerala, India;1. Food Science and Technology Programme, c/o Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore;2. Wyeth Nutritionals (Singapore) Pte Ltd, 1 Tuas South Avenue 4, Singapore 637609, Singapore;1. School of Science, RMIT University, Bundoora, Melbourne, VIC, 3083, Australia;2. FrieslandCampina, Amersfoort, the Netherlands;3. Monash Biomedical Imaging, Monash University, Clayton, VIC, 3168, Australia;4. Spraying Systems, Fluid Air, Melbourne, Australia;5. Wageningen University and Research, Wageningen, the Netherlands;1. School of Science, RMIT University, Bundoora, Melbourne, VIC 3083, Australia;2. FrieslandCampina, Amersfoort, the Netherlands;3. School of Science (Applied Chemistry and Environmental Science), RMIT University, Melbourne, VIC 3001, Australia;4. Spraying Systems, Fluid Air, Melbourne, Australia;5. Wageningen University and Research, Wageningen, the Netherlands |
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| 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 aw = 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, aw = 0.11 is optimal to limit formation of Maillard reaction products. |
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