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A convenient new analysis of dihydroxyacetone and methylglyoxal applied to Australian Leptospermum honeys
Journal article   Open access   Peer reviewed

A convenient new analysis of dihydroxyacetone and methylglyoxal applied to Australian Leptospermum honeys

Sarah Windsor, Matthew Pappalardo, Peter R Brooks, Simon Williams and M Manley-Harris
Journal of Pharmacognosy and Phytotherapy, Vol.4(1), pp.6-11
2012
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https://doi.org/10.5897/JPP11.025View
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Abstract

high-performance liquid chromatography dihydroxyacetone methylglyoxal Leptospermum manuka
New Zealand mānuka (Leptospermum scoparium) honey is known to exhibit non-peroxide antibacterial activity caused by the active ingredient methylglyoxal which arises by chemical conversion of dihydroxyacetone during honey maturation. This study determines whether methylglyoxal and dihydroxyacetone are present in Australian Leptospermum honeys. This research developed a rapid and sensitive high-performance liquid chromatographic method for the concurrent analysis of methylglyoxal and dihydroxyacetone in honeys. Both compounds were quantified as their O-(2, 3, 4, 5, 6-pentafluorobenzyl) hydroxylamine. HCl derivatives on single run reversed phase high-performance liquid chromatography with diode array detection. Four species of monofloral Leptospermum honeys sourced from Northern Rivers Region, New South Wales, Australia contained methylglyoxal and dihydroxyacetone. The highest methylglyoxal concentrations were found in Leptospermum polygalifolium honeys.

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