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Fish quality assessment with ion mobility based gas detector.

O Raatikainen1, J Pursiainen, P Hyvönen

  • 1Food and Health Research Centre, University of Kuopio, Box 1627, FIN-70211 Kuopio, Finland.

Mededelingen (Rijksuniversiteit Te Gent. Fakulteit Van De Landbouwkundige En Toegepaste Biologische Wetenschappen)
|June 16, 2005
PubMed
Summary

Gas detector analysis of volatile compounds in vendace gills effectively evaluates fish freshness. This ion mobility distribution technique offers a new tool for food quality assessment, showing seasonal variations.

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Area of Science:

  • Food Science
  • Analytical Chemistry
  • Fisheries Science

Background:

  • Assessing fish freshness is crucial for food safety and quality.
  • Traditional methods for fish freshness evaluation include microbial counts, K-value, Torrymeter scores, and sensory evaluation.
  • Volatile compounds in fish tissues are indicators of spoilage and freshness.

Purpose of the Study:

  • To evaluate the freshness of vendace (Coregonus albula L.) using the measurement of extractable volatile compounds from gills.
  • To assess the utility of the MGD-1 gas detector, based on ion mobility distribution (IMCELL technique), for fish freshness evaluation.
  • To compare the results obtained from the ion mobility distribution technique with traditional reference methods.

Main Methods:

  • Hexane extracts of vendace gills were analyzed using the MGD-1 gas detector.

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  • The MGD-1 detector measures ion mobility distribution (IMCELL technique) of volatile compounds.
  • Samples were analyzed over a 7-day storage period, with reference methods including microbial counts, K-value, Torrymeter scores, and sensory evaluation.

    • Main Results:

    • Ion mobility distribution profiles of vendace gills changed significantly during the 7-day storage period.
    • The findings from the ion mobility distribution technique correlated well with traditional reference methods for freshness evaluation.
    • Seasonal differences in fish freshness were observed, likely due to variations in microbial flora.

    Conclusions:

    • The MGD-1 gas detector, utilizing ion mobility distribution, is a viable tool for assessing vendace freshness.
    • This technique provides a new analytical method for food quality assessment.
    • Seasonal variations influence fish freshness, highlighting the need for context-specific quality assessments.