DETERMINATION OF OPTICAL PROPERTIES OF COLORANTS IN SOME CONFECTIONERY PRODUCTS

393 Volume 5, Issue 10: Special Issue (EJAR) ISSN: 2181-2020 MPHAPP THE 6TH INTERNATIONAL SCIENTIFIC AND PRACTICAL CONFERENCE “MODERN PHARMACEUTICS: ACTUAL PROBLEMS AND PROSPECTS” TASHKENT, OCTOBER 17, 2025 in-academy.uz DETERMINATION OF OPTICAL PROPERTIES OF COLORANTS IN SOME CONFECTIONERY PRODUCTS Taniyev O.U. Tashkent Pharmaceutical Institute, Tashkent city, Republic of Uzbekistan E-mail: [email protected], Tel:+99899-121-27-55 https://doi.org/10.5281/zenodo.17339536 Currently, synthetic dyes are widely used in the production of food products, pharmaceuticals and beverages. This, in turn, requires constant control over the quantity and quality of these dyes that can be added.[1,2] In this article, selected blue, black, red and yellow confectionery products were taken for analysis and first the light reflection properties and then the optical properties of their solutions were analyzed using a spectrophotometer.[3,4] The aim of the experiment was a qualitative and quantitative analysis of the dyes contained in selected colored confectionery products. The resulting confectionery products consisted of red, yellow, blue, and black dyes, as well as natural beetroot dye. Each product was dry-weighed on a precision analytical balance and ground into powder. The optical properties of the powder were preliminarily analyzed using an X.Rite.eye one pro instrument. The results are presented in the table. As can be seen from the resulting table, we can see that the highest light reflectance coefficient (R) belongs to the red color. At λ =700nm, Rred=0.6802, at λ =700nm, Rblue=0.35098, at λ=700nm, Rblack=0.34273. It was found that the R values of blue and black are close to each other. λnm R1 yellow R2 red R3 blue R4 black 350 0,05192 0,13828 0,16087 0,09114 400 0,04246 0,13468 0,14675 0,0834 450 0,0394 0,12166 0,15011 0,07763 500 0,091 0,06307 0,29578 0,04789 550 0,22338 0,06031 0,26511 0,04628 600 0,45159 0,35653 0,08535 0,07414 650 0,46126 0,6014 0,06472 0,05628 700 0,48562 0,6802 0,35098 0,34273