The optical properties of including anthocyan extracts from plant’s material

Abstract

Objective. The study objective is to develop the spectrophotometric assessment of degradation of anthocyanin pigments in extracts from stained plant parts. Methods. The study included 19 plant species. Extractants were neutral and acidified with hydrochloric acid water and 95 % ethanol. Aluminum chloride was added to alcohol extracts prior to the test. Absorption spectra were recorded in the range of 210680 nm, specific absorption in terms of dry matter, anthocyanin degradation coefficient (as the ratio of absorption peak maxima of extracts from raw and dry raw materials in acid medium), and also bathochromic shift were calculated. Results. Anthocyanins in extracts from flowers were kept in comparatively large quantities, but they had high degradation coefficients - i.e. low resistance to drying. Stability of anthocyanins in extracts from pericarp and leaves was higher. Conclusions. The developed method can be used in the preliminary selection of promising plants for the production of anthocyanin-containing phytopreparations.