Halochromic optical nose for assessment of spoilage of packed seer fish

• Published in: Pigment & resin technology Vol. 50; no. 6; pp. 502 - 507
• Main Authors: Devarayan, Kesavan, Sivakami Nagaraju, Kopperundevi, Pandiyan, Padmavathi
• Format: Journal Article
• Language: English
• Published: Bradford Emerald Publishing Limited 15-11-2021; Emerald Group Publishing Limited
• Subjects: Biodegradability; Color; Decomposition; Dyes; Fish; Fishing; Fourier transforms; Halochromism; Infrared analysis; Moisture absorption; Monitoring; Polysaccharides; Real time; Sensors; Spectrum analysis; Spoilage; Temperature; Thermogravimetric analysis; Thin films; Dyes; Seer fish spoilage; Polymer composite; Fish spoilage; Halochromic sensor; Film properties; pH sensor; Seer fish; Thin film
• ISSN: 0369-9420; 1758-6941; 0369-9420
• DOI: 10.1108/PRT-08-2020-0085

Purpose
The present study aims to describe the development of halochromic thin film sensors using mixed indicator dyes for monitoring the spoilage of packed seer fish.
Design/methodology/approach
Thin film was prepared using renewable polysaccharide incorporated with mixed indicator dyes. The thin film was characterized using ultraviolet visible and Fourier transform-infrared spectroscopy. The characteristics of the thin film were studied by analyzing the CIELAB and Red Green Blue values and biodegradability. The thin films were evaluated for real-time monitoring of the spoilage of packed seer fish.
Findings
The thin film sensors were found to exhibit excellent halochromism. The color changes were visible and distinguishable. The sensors responded efficiently for real-time monitoring of spoilage of fish by showing unique color changes.
Originality/value
This study provides promising mixed indicator that exhibits different colors in the alkaline pH. Also the present study reveals a potential combination of materials for preparation of halochromic sensors that can be used for monitoring the spoilage of packed seer fish in real time.