A colorimetric ph sensor based on clitoria sp and brassica sp for monitoring of food spoilage using chromametry

Noor Azizah Ahmad, Lee Yook Heng, Faridah Salam, Mohd Hazani Mat Zaid, Sharina Abu Hanifah

Research output: Contribution to journalArticle

Abstract

A developed colorimetric pH sensor film based on edible materials for real-time monitoring of food freshness is described. The mixed natural dyes from edible plants Clitoria sp and Brassica sp were extracted and incorporated into ι-carrageenan film as a colorimetric pH sensor film for monitoring food spoilage and its freshness. The color changes of the developed colorimetric sensor film were measured with chromametry and UV-vis spectroscopy, respectively. Experimental results show that colorimetric pH sensor film demonstrated statistically significant differences (p < 0.05) between CIE-L*a*b* coordinates color system indicated that the developed colorimetric sensor film was able to give a gradual change in color over a wide pH range. The color of the colorimetric sensor film also changes discretely and linearly with factors that contribute to food spoilage using shrimp and durian samples. Moreover, the developed colorimetric pH sensor film has the potential to be used as a safe, non-destructive testing and also a flexibly visual method for direct assessment of food freshness indicator during storage.

Original languageEnglish
Article number4813
JournalSensors (Switzerland)
Volume19
Issue number21
DOIs
Publication statusPublished - Nov 2019

Fingerprint

Clitoria
pH sensors
Spoilage
Brassica
food
Food
Color
Monitoring
sensors
color
Bombacaceae
Edible Plants
Carrageenan
Sensors
Spectrum Analysis
Coloring Agents
Nondestructive examination
Ultraviolet spectroscopy
Dyes
dyes

Keywords

  • Colorimetric pH sensor film
  • Food spoilage
  • Mixed natural dye
  • ι-carrageenan

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Electrical and Electronic Engineering

Cite this

A colorimetric ph sensor based on clitoria sp and brassica sp for monitoring of food spoilage using chromametry. / Ahmad, Noor Azizah; Heng, Lee Yook; Salam, Faridah; Zaid, Mohd Hazani Mat; Hanifah, Sharina Abu.

In: Sensors (Switzerland), Vol. 19, No. 21, 4813, 11.2019.

Research output: Contribution to journalArticle

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