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Infrared spectroscopy as a rapid tool to detect methylglyoxal and antibacterial activity in Australian honeys

journal contribution
posted on 03.07.2018, 00:00 by Y Sultanbawa, Daniel CozzolinoDaniel Cozzolino, S Fuller, A Cusack, M Currie, H Smyth
© 2014 Elsevier Ltd. All rights reserved.Methylglyoxal (2-oxopropanal) is a compound known to contribute to the non-peroxide antimicrobial activity of honeys. The feasibility of using infrared spectroscopy as a predictive tool for honey antibacterial activity and methylglyoxal content was assessed. A linear relationship was found between methylglyoxal content (279-1755 mg/kg) in Leptospermum polygalifolium honeys and bacterial inhibition for Escherichia coli (R2 = 0.80) and Staphylococcus aureus (R2 = 0.64). A good prediction of methylglyoxal (R2 0.75) content in honey was achieved using spectroscopic data from the mid infrared (MIR) range in combination with partial least squares regression. These results indicate that robust predictive equations could be developed using MIR for commercial application where the prediction of bacterial inhibition is needed to 'value' honeys with methylglyoxal contents in excess of 200 mg/kg.

Funding

Other

History

Volume

172

Start Page

207

End Page

212

Number of Pages

6

eISSN

1873-7072

ISSN

0308-8146

Publisher

Elsevier BV

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

University of Queensland; University of Adelaide; Department of Agriculture, Fisheries and Forestry

Era Eligible

Yes

Journal

Food Chemistry