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Ph-Responsive Color Indicator Films Based on Methylcellulose/Chitosan Nanofiber and Barberry Anthocyanins for Real-Time Monitoring of Meat Freshness Publisher Pubmed



Alizadehsani M1 ; Tavassoli M2 ; Mohammadian E3 ; Ehsani A4 ; Khaniki GJ1 ; Priyadarshi R5 ; Rhim JW5
Authors
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Authors Affiliations
  1. 1. Food Safety and Hygiene Division, Department of Environmental Health, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Student Research Committee, Department of Food Sciences and Technology, Faculty of Nutrition and Food Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
  3. 3. Department of Medicinal Chemistry, School of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. Nutrition Research Center, Department of Food Sciences and Technology, Faculty of Nutrition and Food Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
  5. 5. Department of Food and Nutrition, BioNanocomposite Research Institute, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, South Korea

Source: International Journal of Biological Macromolecules Published:2021


Abstract

A new pH-responsive color indicator film was prepared by blending barberry anthocyanin (BA) with methylcellulose (MC)/chitosan nanofiber (ChNF) composite film. The addition of ChNF and BA increased the mechanical and water barrier properties but reduced the UV–vis light transmittance of the composite film. Anthocyanin showed proper compatibility with the composite film. The color indicator film showed an apparent color change in response to pH changes and ammonia gas, being suitable for indicating the change in food pH, the formation of volatile nitrogen compounds, and food decay. The color indicator film changed clearly from reddish-pink to pale peach and finally to yellow when exposed to different pH buffers. However, in response to ammonia vapor, the color changed from pink to pale green and yellow. Besides, the color indicator film exhibited remarkable antioxidant activity. Therefore, the pH-sensing color indicator film can be used as a smart indicator for real-time freshness monitoring of meat and seafood products. © 2020 Elsevier B.V.
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