Naslov
Selected Topics of Honey Volatile Organic Compounds Research

Autori
Jerković, Igor

Vrsta, podvrsta i kategorija rada
Poglavlja u knjigama, znanstveni

Knjiga
Honey: Current Research and Clinical Application

Urednik/ci
Majtan, J.

Izdavač
Nova Science Publishers

Grad
New York (NY)

Godina
2012

Raspon stranica
1-16

ISBN
978-1-61942-656-6

Ključne riječi
honey volatiles

Sažetak
Five sources of honey volatile organic compounds (VOCs) have been proposed: 1) plant constituents (phytochemicals), 2) phytochemicals transformation by the bees, 3) direct compounds generation by the bees or compounds transfer from the combs environment, 4) their generation by honey thermal processing and 5) microbial or environmental contaminants. Honey VOCs are present at low concentrations as more or less complex mixtures of compounds with different organic functionalities. Ultrasonic solvent extraction (USE) has been used a suitable method to obtain reliable honey fingerprint of more and less volatile (low- and high-molecular) compounds in comparison to hydrodistillation (HD) or simultaneous distillation-extraction (SDE) that generate thermal artefacts. However, optimization of the extraction solvent polarity is necessary to obtain reliable VOCs profile. In addition, the use of headspace solid-phase microextraction (HS-SPME) for the same honey type often provides distinct headspace VOCs profiles in comparison to USE, and selection of HS-SPME fibre is needed prior to the extraction. The immediate contribution of the bees and combs to honey volatiles under controlled food-flow conditions (saccharose solution, no plant source) provided "saccharose honey" with VOCs constituted mainly of higher alcohols and saturated linear long-chain hydrocarbons. Identified chemical structures were related to the composition of combs and cuticular waxes, and less to the bee pheromones and all of them can be excluded as reliable botanical-origin biomarkers. On the other hand, as one of the most typical features of a particular honey, norisoprenoids, terpenes, benzene derivatives and others have been proposed as a quality marker for the authenticity of the floral origin. Nowadays, more than 600 compounds have been identified as volatiles in honeys of different floral origins. Subsequently, some specific-marker volatile compounds have been suggested, e.g., methyl anthranilate for Citrus spp. honeys, 3- and 2-aminoacetophenone for Castanea sativa honey, methyl syringate for Asphodelus microcarpus Salzm. et Viv. honey and others. Only a few compounds seem to be specific, and many of them can be found in variable concentrations in various honey types. In addition, isolated VOCs could exhibit health and therapeutic qualities. Therefore, selected USE extracts were further investigated in order to unlock their antiradical and antioxidant potential. The extracts showed remarkably higher antiradical capacity (DPPH assay) and antioxidant capacity (FRAP assay) in comparison to the honey. These findings reveals new potential of USE honey extracts for further more detail research on biological activity.

Izvorni jezik
Engleski

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