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  • Title: Infrared spectroscopy as a rapid tool to detect methylglyoxal and antibacterial activity in Australian honeys.
    Author: Sultanbawa Y, Cozzolino D, Fuller S, Cusack A, Currie M, Smyth H.
    Journal: Food Chem; 2015 Apr 01; 172():207-12. PubMed ID: 25442544.
    Abstract:
    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 Escherichiacoli (R(2) = 0.80) and Staphylococcusaureus (R(2) = 0.64). A good prediction of methylglyoxal (R(2) 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 200mg/kg.
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