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Degradation of 5-Hydroxymethylfurfural in Honey

Authors

  • B. Fallico,

    1. Authors Fallico and Arena are with DOFATA sez. Tecnologie Agroalimentari, Univ. di Catania, Via S.Sofia 98, 95123 Catania, Italy. Author Zappala is with Quality Assurance Labs, Gruppo Zappalà, Via Ardichetto sn, 95019 Zafferana Etnea, Italy). Direct inquiries to author Fallico (E-mail: bfallico@unict.it).
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  • E. Arena,

    1. Authors Fallico and Arena are with DOFATA sez. Tecnologie Agroalimentari, Univ. di Catania, Via S.Sofia 98, 95123 Catania, Italy. Author Zappala is with Quality Assurance Labs, Gruppo Zappalà, Via Ardichetto sn, 95019 Zafferana Etnea, Italy). Direct inquiries to author Fallico (E-mail: bfallico@unict.it).
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  • M. Zappala

    1. Authors Fallico and Arena are with DOFATA sez. Tecnologie Agroalimentari, Univ. di Catania, Via S.Sofia 98, 95123 Catania, Italy. Author Zappala is with Quality Assurance Labs, Gruppo Zappalà, Via Ardichetto sn, 95019 Zafferana Etnea, Italy). Direct inquiries to author Fallico (E-mail: bfallico@unict.it).
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Abstract

ABSTRACT:  5-Hydroxymethylfurfural (HMF) is the most important intermediate product of the acid-catalyzed dehydration reaction of hexoses and/or Maillard reaction; furthermore, it is the most used index to evaluate thermal damages or ageing in food products. Usually its degradation reactions, being very slow, are neglected. This study reports the findings concerning the degradation kinetics of HMF, in honeys of different floral origin at a temperature between 25 and 50 °C. The results highlighted higher degradation rates (kHMFdegradation) compared to the corresponding formation rates (kHMFformation) in chestnut and citrus samples. Similar k-values were found in multifloral honey. Moreover, the reaction of HMF degradation was characterized by lower activation energy (Ea) values compared to Ea formation values. The final concentration of HMF in honey, during storage at room temperature, should be ascribed to high sugar concentration. The fluctuation of HMF in honeys could depend on the equilibrium between the accumulation and the degradation processes. This can affect the validity of HMF as storage index in some honeys, above all during the analysis of those honeys whose legislation is too restrictive (citrus) or in chestnut honey analysis where it does not accumulate.

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