Koldaev V.M.
Scientific Review. Biological science 2023; (3): 5-10
The purpose of the study was to determine the spectrophotometric numerical indicators of the photoabsorption properties of carotene-containing plant extracts. The study was carried out on yellow-orange flowers of plants of 48 species from 17 families. The total content of carotenoids in the extracts was determined by potassium bichromate. The integral intensities of absorption in the ultraviolet, visible ranges and peaks of triads of carotenoids were calculated by integrating within the inflection points of the spectral line using the Simpson formula. It has been established that non-traditional indicators of the total absorption of the carotenoid triad and its individual peaks have average coefficients of variation from 4.7 to 14.3%, and the variation of the fine structure index and carotenoid content is 2.05 - 7.68 times greater. The absorption value of the carotenoid triad has a strong relationship with the content of carotenoids with a correlation coefficient of 0.98±0.019, the relationship between them has a linear form. The greatest validity as an indicator of carotenoid photoabsorption is the integral absorption intensity of the triad. The unconventional absorption index of the triad is associated with photoabsorption processes, which are very sensitive to environmental factors, and can be used as a relatively simple spectrophotometric test for ecological assessments of the state of plant resources. The work was carried out within the framework of the state task of the Ministry of Science and Higher Education of the Russian Federation on topic No. 121031000120-9.
