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The effect of heating conditions on losses and regeneration of betacyanins

Einfluβ der Erhitzungsbedingungen auf Verluste und Regeneration der Betacyanine

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Zusammenfassung

Die Verluste an Betacyaninen während der Erhitzung auf 90 °C und ihre Regeneration nach dem Erhitzen wurden in Rote-Beete-Saft und in verschieden gepufferten reinen Betanin-Lösungen untersucht. Bei 5 °C ist die Regeneration der Farbstoffe besser als bei 20 °C. Die Zeit bis zur maximalen Regeneration der Farbstoffe ist für den Saft und für die Betanin-Lösungen unterschiedlich. Pufferart und -konzentration sind unter sauerstofffreien Bedingungen unwesentlich; bei Anwesenheit von Sauerstoff üben sie indessen einen merklichen Einfluβ aus. Beim Erhitzen in Gegenwart von Sauerstoff werden die Betanin-Verluste von der Diffusionsgeschwindigkeit des Luftsauerstoffs beeinflußt.

Summary

The losses of Betacyanins during heating at 90 °C and their regeneration after heating were investigated in red beet juice and solutions of pure betanin in different buffers. It was found that the regeneration of pigments during storage of heated samples is greater at 5 °C than at 20 °C. The time, in which the pigments reach the maximum concentration is different for juice and pure betanin solutions. The influence of the type of buffer and its concentration on heating in the absence of oxygen is insignificant, on the other hand the influence is distinctly marked when the betanin heated in the presence of oxygen. When heated in the presence of air, the betanin losses are influenced by the rate of diffusion of oxygen from the air.

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Authors and Affiliations

  1. Institute of Food Technology of Plant Origin, Academy of Agriculture, Wojska Polskiego 31, PL-60-624, Poznań, Poland

    Janusz Czapski

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  1. Janusz Czapski
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Czapski, J. The effect of heating conditions on losses and regeneration of betacyanins. Z Lebensm Unters Forch 180, 21–25 (1985). https://doi.org/10.1007/BF01042906

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  • DOI: https://doi.org/10.1007/BF01042906

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