The study of the absorption spectra of the wines of different types and ages in the UV range of wavelengths

Abstract

the paper highlights the results of the absorption spectra analysis of base wines of
various types and ages in the UV wavelength range. Patterns have been established for
optical density vatriations in the UV wavelength range of base wine samples depending
on their type and age. it is shown that the optical density of base wines of the same age
at the wavelength of 280 nm is proportional to the mass concentration of total phenolic
substances, determined with Folin-Chocalteu reagent. the concept of “phenolic substances
of grapes and wine absorption coefficient” was introduced. a methodological approach was
developed to determine mass concentration of phenolic substances in young base wines