The effect of microwave heating on the optical characteristics of berry extracts

The paper presents the optical characteristics of extracts obtained from marc berries of the heather family - lingonberries, cranberries, blueberries and blueberries. To obtain extracts, the berries were pressed by electromechanical method. From the obtained marc berries, water extracts were obtained in a microwave oven with a power of 800 W and a generation frequency of 2450 MHz for different exposure modes from 288 W to 800 W. Hydraulic module 1:10. The duration of the microwave heating 60 seconds. Controls were extracts obtained using hot water and infusion for 10 minutes. The optical characteristics of the juices and extracts from the marc berries were measured spectrophotometrically in the wavelength range of 410-630 nm. The maximum values of the optical spectra were recorded at D520, regardless of the berries used. An increase in the power of the microwave effect led to an increase in the optical values of the spectra of the extracts: bilberry > blueberry> lingonberry> cranberry...