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Influence of sodium tripolyphosphate and citric acid on the shelf life of thornback ray (Raja clavata L.)

Einfluß von Natriumtripolyphosphat und Citronensäure auf die Haltbarkeit von Nagelrochen (Raja clavata L.)

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Zusammenfassung

Das Eintauchen von Nagelrochenflügeln in Natriumtripolyphosphatlösung (12%) während 5 min verlängerte die Haltbarkeitsdauer mit etwa 2 Tagen, verbesserte das Aussehen und schaltete Gewichtsverluste aus. Mit Citronensäure (5 min in 0,5 % Lösung) wurde eine Verbesserung der Haltbarkeit von ungefähr 3 Tagen bekommen, aber diese Behandlung verursachte ein leichtes Ausbleichen und Gewichtsverluste von etwa 5%.

Beide Verbindungen konnten zweckmäßig das Abbauen des Harnstoffes zu Ammoniak in Nagelrochen verzögern.

Summary

Sodium tripolyphosphate dips (5 min in 12% solution) extended shelf life of thornback ray wings by about 2 days, improved the appearance and eliminated weight losses. With citric acid dips (5 min in 0.5% solution) a 3 day extension of storage life was obtained but the treatment had a slight bleaching effect and caused weight losses of about 5 %. Both compounds were effective in retarding the breakdown of urea with formation of ammonia in thornback ray.

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Authors and Affiliations

  1. Fisheries Research Station, Ministry of Agriculture, Ankerstraat 1, B-8400, Oostende, Belgium

    Wilfried Vyncke

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  1. Wilfried Vyncke
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Vyncke, W. Influence of sodium tripolyphosphate and citric acid on the shelf life of thornback ray (Raja clavata L.). Z Lebensm Unters Forch 166, 284–286 (1978). https://doi.org/10.1007/BF01127654

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  • DOI: https://doi.org/10.1007/BF01127654

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