Influence of pH on color variation and stability of cyanidin and cyanidin 3-O-β-glucopyranoside in aqueous solution
| Autor: | Nataša Poklar Ulrih, Violeta Rakić |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
030309 nutrition & dietetics
General Chemical Engineering Cyanidin chroma stabilnost raztopin Industrial and Manufacturing Engineering Food processing and manufacture 03 medical and health sciences chemistry.chemical_compound 0404 agricultural biotechnology lightness TX341-641 Colorimetry udc:547.973:544.35 0303 health sciences Aqueous solution cyanidin 3-o-β-glucopyranoside Chemistry Nutrition. Foods and food supply cianidin antociani hue angle 04 agricultural and veterinary sciences General Chemistry barvila TP368-456 040401 food science anthocyanins color cyanidin color stability Food Science Nuclear chemistry cyanidin 3-O-β-glucopyranoside |
| Zdroj: | CyTA-Journal of Food, Vol 19, Iss 1, Pp 174-182 (2021) CYTA: journal of food, vol. vol 19, no. 1, pp. 174-182, 2021. |
| ISSN: | 1947-6345 1947-6337 |
| Popis: | Changes in color and color stability of cyanidin and cyanidin 3-O-β-glucopyranoside (Cy3Glc) in aqueous solutions were investigated at pHs from 0.5 to 13.1, by combination of colorimetry and spectrophotometry. The glucosidic substitution at C-3 of cyanidin (i.e., Cy3Glc), moved the tonalities toward the yellow pole of the chromatic circle, which resulted in high Chroma increases and a hypsochromically shifted visible absorbance maximum (λmax-vis). Under the most acidic and alkaline conditions, cyanidin showed greater Lightness compared with the rest of the pH range. At these extreme pHs, the lower Lightness of Cy3Glc was coupled with a high Chroma value. As a consequence, Cy3Glc showed its most intense color under the most acidic and alkaline conditions, and did not show visually perceptible color at neutral pH. At pH |
| Databáze: | OpenAIRE |
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