Smart packaging for the monitoring of fish freshness

Alexis Pacquit*, King Tong Lau, Dermot Diamond

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

8 Citations (Scopus)


The development of chromo-reactive sensor spots for real time monitoring of fish freshness is described. The on-package sensor spots incorporating an immobilized pH sensitive dye, respond through visible colour change to basic volatile spoilage compounds collectively known as Total Volatile Basic Nitrogen (TVB-N). Trials on fresh fish filets have verified that the sensor can be employed for real time monitoring of fish spoilage. The sensor response can be interrogated with a simple, inexpensive reflectance colorimeter that we have developed based on two LEDs and a photodetector.

Original languageEnglish
Article number69
Pages (from-to)545-550
Number of pages6
JournalProceedings of SPIE- The International Society for Optical Engineering
Publication statusPublished - 2005
Externally publishedYes
EventOpto-Ireland 2005: Optical Sensing and Spectroscopy - Dublin, Ireland
Duration: 4 Apr 20056 Apr 2005


  • Chromo-reactive dyes
  • Freshness monitoring
  • Smart packaging
  • TVBN
  • Volatile amines

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