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- W4365142126 abstract "Purpose The purpose of this paper was to study the color change kinetics of lac dye in response to aldehydes, carbon dioxide and other food spoilage metabolites for its potential application in intelligent food packaging. Design/methodology/approach UV–Vis spectroscopy was used to study the color change of dye solution. Ratio of absorbance of dye solution at 528 nm (peak of ionized form) to absorbance at 488 nm (peak of unionized form) was used to study the color change. Color change kinetics was studied in terms of change in absorbance ratio ( A 528 / A 488 ) with time using zero and first-order reaction kinetics. Lac dye-based indicator was prepared to validate the result of study for monitoring quality of strawberries. Findings Lac dye was orange-red in acidic medium and purple in alkaline medium. Color change of dye in response to benzaldehyde followed zero-order reaction kinetics, whereas for carbon dioxide first-order model was found best. No color change of dye solution was observed for alcohols, ketones and sulfur compounds. In the validation part, the color of the indicator label changed from purple to orange when the strawberries spoiled. Originality/value The study expands application area for lac dye as sensing reagent in intelligent food packaging for spoilage or ripeness detection of fruits and vegetables." @default.
- W4365142126 created "2023-04-13" @default.
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- W4365142126 date "2023-04-13" @default.
- W4365142126 modified "2023-10-18" @default.
- W4365142126 title "Color change kinetics of lac dye as influenced by some food spoilage metabolites: validation for spoilage monitoring of strawberries" @default.
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- W4365142126 doi "https://doi.org/10.1108/prt-12-2022-0151" @default.
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