Plant Pigments: Qualitative and Quantitative Analysis of Physicochemical Properties Using Brassica oleracea and Mobile Devices
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Abstract
Aqueous and alcoholic extracts of red cabbage (Brassica oleracea var. capitata f. rubra) were obtained to analyze their decoloration kinetics in response to sodium metabisulfite and to produce environmentally friendly watercolors with good stability over time. The watercolors were made with water, glycerin, gum arabic, and freeze-dried extract. For the kinetic study, a mobile device with the Carolina® RGB Colorimeter app was used to record color parameters during the reaction. Results indicate first-order degradation kinetics for the alcoholic extract and zero-order kinetics for the aqueous extract.
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References
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