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Color change kinetics of lac dye as influenced by some food spoilage metabolites: validation for spoilage monitoring of strawberries

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Title Color change kinetics of lac dye as influenced by some food spoilage metabolites: validation for spoilage monitoring of strawberries
Not Available
 
Creator Priyanka Sakare
Saroj Kumar Giri
 
Subject Natural dye
Lac dye
pH response
Intelligent packaging
Food spoilage metabolites
 
Description Not Available
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 (A528/A488) 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.
Not Available
 
Date 2024-01-15T09:45:51Z
2024-01-15T09:45:51Z
2023-03-19
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/81253
 
Language English
 
Relation Not Available;
 
Publisher Not Available