METHOD FOR DETERMINING ANTIOXIDANT ACTIVITY OF TEA Russian patent published in 2019 - IPC G01N33/00 G01N33/02 

FIELD: food industry.

SUBSTANCE: invention relates to food industry, in particular to production of tea, and can be used in analysis of black, green and other types of tea. Method for determining antioxidant activity of tea involves reacting a diluted extract of tea produced in a tasting brewing mode with an oxidizing reagent – sodium 2,6-dichlorphenolindophenolate, determining the value of the optical density of the reaction solution by a colorimetric method at wavelength of 500–520 nm, calculating antioxidant activity of tea in terms of quercetin by the disclosed formula.

EFFECT: use of the method provides obtaining reliable data on the value of antioxidant activity of tea substances passing into the water extract during brewing for tasting analysis or food consumption of the beverage.

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