A.V. Aprelev, E.V. Davydova, V.A. Smirnov

FSUE “VNIIFTRI”, Mendeleevo, Moscow region
aprelev@vniiftri.ru,
davydova@vniiftri.ru

Al’manac of Modern Metrology № 1 (21) 2020, pages 218–225

Painted fruits are distinguished by the presence of anthocyanins — compounds that deter-mine their color and have high antioxidant activity. The paper describe developments of li-braries of spectra of artificial dyes used as additives in drinks and food products and of spec-tra of natural juices (containing anthocyanins) in the wavelength range of the visible part of the spectrum from 400 to 760 nm. A group of specialists of VNIIFTRI conducted a study of changes in the extrema of the optical density of natural juice at pH values from 1 to 10. The resulting wave graphs of the function of the optical density of natural wine samples at various pH values propagating along the Ox axis, plotted at a fixed point in time (t = const) have all types of shift of the absorption band.

Key words: natural dyes, food colors, drinks, juices and juice drinks.

Full texts of articles are available only in Russian in printed issues of the magazine.