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Fish freshness detection by a computer screen photoassisted based gas sensor array.

Adriano Alimelli1, Giorgio Pennazza, Marco Santonico

  • 1Department of Electronic Engineering, University of Rome Tor Vergata, Roma, Italy.

Analytica Chimica Acta
|March 28, 2007
PubMed
Summary
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A novel chemical sensor array uses a computer screen and webcam to detect fish spoilage by analyzing volatile compounds. This portable system offers a simple, efficient method for widespread fish freshness control.

Area of Science:

  • Analytical Chemistry
  • Biosensor Technology
  • Food Science

Background:

  • Traditional fish freshness assessment relies on methods like gas chromatography.
  • Existing sensor systems, including artificial olfaction, aim for portable freshness control but lack broad distribution.
  • Volatile compounds, particularly amines, are key indicators of fish spoilage.

Purpose of the Study:

  • To develop a simple, portable, and broadly distributable chemical sensor system for fish freshness monitoring.
  • To utilize optical features of chemical sensor layers interrogated by a computer screen and webcam.
  • To classify fish based on storage days and monitor spoilage in real-time.

Main Methods:

  • An array of metalloporphyrin-based chemical sensors was employed.

Related Experiment Videos

  • Optical features (absorbance and emission) of the sensor layers were analyzed.
  • A system using a computer screen and webcam interrogated the sensor array to create spectral fingerprints.

    • Main Results:

    • The sensor array successfully classified thawed fish fillets by storage days.
    • Spoilage in filleted anchovies was monitored with a root mean square error of validation of approximately 30 minutes.
    • The system generated spectral fingerprints capturing absorbance and emission data.

    Conclusions:

    • The developed optical chemical sensor system, leveraging computer peripherals, offers a scalable solution for fish freshness analysis.
    • This technology has the potential for widespread distribution, similar to mobile phones, fulfilling the goal of diffused analytical capabilities.
    • The system provides an efficient and simple method for monitoring fish spoilage, moving beyond laboratory-based techniques.