Using of grape processing waste as a source of biologically active substances pack

Abstract

The purpose of this work is to develop an optimal technology for extracting an antioxidant substances pack from grape extracts that are little used at present, grape pomace, a comparative study of the effect of ultrasound exposure with traditional infusion and microwave irradiation methods on the total content of phenols, flavonoids, anthocyanins, antiradical activity, restoring force when extracting wine production waste - grape pomace. Spectrophotometric methods for determining the total content of phenols, flavonoids, anthocyanins, antiradical activity with the free radical 2,2-diphenyl-1-picrylhydrazyl, restoring ability with the FRAP reagent, antioxidant activity in the model with linoleic acid were chosen as research methods. It is the application of ultrasonic extraction for grape pomace that allows obtaining a higher phenols content (1024 mg gallic acid / 100 g), flavonoids (562 mg catechin / 100 g), anthocyanins (987.45 mg cyanidin-3-glycoside / 100 g), antiradical activity (16.6 mg / cm3), regenerating force (17.01 mmol Fe2 + / 1 kg), antioxidant effect (42.4%). Microwave radiation has a similar effect on the level of a number of indicators of grape pomace extract. However, the indicators of microwave extracts of grape pomace are lower in value than ultrasonic extracts. According to the studies carried out, ultrasonic treatment at the same temperature parameters and process time can be recommended as an intensification method for grape pomace extract obtaining which can be a component of many biologically active additives, as well as cosmetics with a high level of antioxidant substances and antioxidant activity. This will provide extracts with a higher content of nutraceutical substances.