Occurrence of 2-hydroxy-5-methyl-3-hexanone and 3-hydroxy-5-methyl-2-hexanone as indicators of botanic origin in eucalyptus honeys | Health & Environmental Research Online (HERO)

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Citation
Tags

HERO ID

4085373

Reference Type

Journal Article

Title

Occurrence of 2-hydroxy-5-methyl-3-hexanone and 3-hydroxy-5-methyl-2-hexanone as indicators of botanic origin in eucalyptus honeys

Author(s)

de La Fuente, E; Valencia-Barrera, RM; Martinez-Castro, I; Sanz, J

Year

2007

Is Peer Reviewed?

Yes

Journal

Food Chemistry
ISSN: 0308-8146
EISSN: 1873-7072

Volume

103

Issue

Page Numbers

1176-1180

Language

English

DOI

10.1016/j.foodchem.2006.10.020

Web of Science Id

WOS:000246024400014

URL

https://www.scopus.com/inward/record.uri?eid=2-s2.0-33947541768&doi=10.1016%2fj.foodchem.2006.10.020&partnerID=40&md5=06813680180f4a16ed9707e05605dc10
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Abstract

SPME GC-MS analysis of the volatile fraction from 22 Spanish eucalyptus honeys revealed two components which were present in all samples. From their mass spectra they were tentatively assigned as 2-hydroxy-5-methyl-3-hexanone and 3-hydroxy-5-methyl-2-hexanone. As no commercial standards were available for these compounds, they were enzymatically synthesized, respectively, from isovaleraldehyde and pyruvic acid, and from a-ketoisocaproic acid and acetaldehyde, using reactions catalyzed by yeast pyruvate decarboxylase. The prepared products presented retention indices and mass spectra identical to those of the compounds found in eucalyptus honeys. Since these compounds were not found in 165 other honey samples from 19 different floral origins, they appear to be good markers for eucalyptus honey. (c) 2006 Elsevier Ltd. All rights reserved.

Keywords

eucalyptus honey; markers 2-hydroxy-5-methyl-3-hexanone; 3-hydroxy-5-methyl-2-hexanone; GC-MS; volatiles