https://doi.org/10.17113/ftb.53.01.15.3763
Evaluation of the Physicochemical Parameters of Functional Whey Beverages
Aistė Kabašinskienė1*, Algirdas Liutkevičius2, Dalia Sekmokienė1, Gintarė Zaborskienė1,2 and
Jūratė Šlapkauskaitė1
1Lithuanian University of Health Sciences, Department of Food Safety and Quality, Tilzes Str. 18,
LT-47181 Kaunas, Lithuania
2Kaunas University of Technology, Food Institute, Taikos Av. 92, LT-51180 Kaunas, Lithuania
Article history:
Received June 10, 2014
Accepted October 22, 2014
Key words:
whey, flaxseed oil, beverages, ω-3 fatty acids, oxidation
Summary:
The objective of this study is to determine the impact of the key technological parameters on the quality indices of functional beverages produced from whey and enriched with 0.2 % of cold-pressed fl axseed oil, rich in ω-3 fatty acids. The amount of fatty acids, peroxide and anisidine values, fatty acidity, sedimentation and sensory parameters of whey beverages were estimated. It was found that the addition of flaxseed oil affected the sensory, physical and chemical properties of the beverages. High quantities of oleic and α-linolenic fatty acids (18.97 and 54.82 %, respectively) and negligible amounts of palmitic and myristic acids (4.79 and 0.04 %, respectively) were found in the product. On the basis of the obtained results, the beverages from whey enriched with flaxseed oil had a favourable ratio of n-6/n-3 polyunsaturated fatty acids and atherogenic and thrombogenic indices. The addition of a stabiliser and the pasteurisation of whey beverages with flaxseed oil did not affect the sensory parameters and the acidity of the products. The highest peroxide value (2.36 meq O2/kg) and acidity (0.34 %) were found in the samples with pH=4.0 after 30-day storage at (6±1) °С. A strong negative correlation was estimated between the amount of polyunsaturated fatty acids and anisidine value (R=–0.871; p<0.05), peroxide value (R=–0.728; p<0.05) and fatty acidity (R=–0.948; p<0.05).
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