INFLUENCE OF WPC 80 ADDITION ON COLOUR, DROPLET SIZE AND STORAGE STABILITY OF W/O EMULSIONS

M. Tabaszewska, D. Najgebauer-Lejko

Abstract: Whey proteins are characterized with ability to form and stabilize foams and emulsions. The size and distribution of the dispersed droplets significantly affect the stability and colour reflectance ability (colour parameters) of the emulsion. The W/O (water-in-oil) emulsions with different concentrations of WPC 80 (whey protein concentrate with 80% protein), i.e., 0; 1.5; 5; 10; 15% were produced and analysed. The emulsions differed regarding colour parameters, the preparations with higher protein supplementations were darker, more red and yellow and their colour was more saturated. The size of the dispersed phase droplets was not affected up to 10% WPC 80 additive, whereas at higher protein concentrations they were significantly larger. No significant changes of the droplet size in the dispersed phase and of the quality of added whey proteins were observed throughout the experiment duration.

Keywords: droplet size; emulsions; SDS-PAGE; whey protein concentrate

Date published: 2017-08-31