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Thermal behaviour of riboflavin

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Abstract

From the thermal decomposition curves of riboflavin at various heating rates in static air atmosphere, the stages of thermal decomposition of this compound were established. The following kinetic parameters were calculated for the first decomposition stage of this process: activation energy (E a ), reaction order (n), preexponential factor (A) and reaction rate constant (k). A mechanism of the changes is proposed.

Zusammenfassung

Die Stadien der thermischen Zersetzung von Riboflavin wurden aus den Kurven der thermischen Zersetzung in Luftatmosphäre bei verschiedenen Aufheizgeschwindigkeiten ermittelt. Für den ersten Zersetzungsschritt dieses Prozesses werden die Werte für die Aktivierungsenergie (E a ), die Reaktionsordnung (n), den präexponentiellen Faktor (A) und die Reaktionsgeschwindigkeitskonstante (k) berechnet. Für die Umwandlungen wird ein Mechanismus vorgeschlagen.

Резюме

На основе кривых терм ического разложения рибофлав ина, полученных в стат ической атмосфере воздуха и п ри различных скорост ях нагрева, установлены пути его термического разложения. Для перво й стадии разложения р ибофлавина были вычислены такие кинетические параметры, как энерги я активации (E a ), порядо к реакции (n), предэкспон енциальный множител ь (A) и константа скорост и реакции (k). Предложен также механизм разложения.

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Authors and Affiliations

  1. Institute of Fundamental Food Chemistry, Technical University, Lódż, Poland

    J. Masłowska & M. Malicka

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  1. J. Masłowska
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  2. M. Malicka
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Masłowska, J., Malicka, M. Thermal behaviour of riboflavin. Journal of Thermal Analysis 34, 3–9 (1988). https://doi.org/10.1007/BF01913365

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  • DOI: https://doi.org/10.1007/BF01913365

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