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dc.contributor.authorYao, Liu H.-
dc.contributor.authorDatta, Nivedita-
dc.contributor.authorTomás Barberán, Francisco-
dc.contributor.authorMartos, Isabel-
dc.contributor.authorFerreres, Federico-
dc.contributor.authorSinganusong, Riantong-
dc.identifier.citationFood Chemistry 81(2): 159-168 (2003)en_US
dc.description10 pages, 3 figures, 4 tables.en_US
dc.description.abstractFlavonoids, phenolic acids and abscisic acid of Australian and New Zealand Leptospermum honeys were analyzed by HPLC. Fifteen flavonoids were isolated in Australian jelly bush honey (Leptospermum polygalifolium), with an average content of 2.22 mg/100 g honey. Myricetin (3,5,7,3′,4′,5′-hexahydroxyflavone), luteolin (5,7,3′,4′-tetrahydroxyflavone) and tricetin (5,7,3′,4′,5′-pentahydroxyflavone) were the main flavonoids identified. The mean content of total phenolic acids in jelly bush honey was 5.14 mg/100 g honey, with gallic and coumaric acids as the potential phenolic acids. Abscisic acid was quantified as twice the amount (11.6 mg/100 g honey) of the phenolic acids in this honey. The flavonoid profile mainly consisted of quercetin (3,5,7,3′,4′-pentahydroxyflavone), isorhamnetin (3,5,7,4′-tetrahydroxyflavone 3′-methyl ethyl), chrysin (5,7-dihydroxyflavone), luteolin and an unknown flavanone in New Zealand manuka (Leptospermum scoparium) honey with an average content of total flavonoids of 3.06 mg/100 g honey. The content of total phenolic acids was up to 14.0 mg/100 g honey, with gallic acid as the main component. A substantial quantity (32.8 mg/100 g honey) of abscisic acid was present in manuka honey. These results showed that flavonoids and phenolic acids could be used for authenticating honey floral origins, and abscisic acid may aid in this authentication.en_US
dc.description.sponsorshipAppreciation is also expressed to the Rural Industries Research and Development Corporation (RIRDC, Australia) for financial support for this project, and Department of Education, Science and Training (DEST, formerly DETYA, Australia) for providing an IPRS (formerly OPRS) fund support.en_US
dc.format.extent259768 bytes-
dc.subjectBotanical originen_US
dc.subjectPhenolic acidsen_US
dc.subjectFloral markersen_US
dc.subjectAbscisic aciden_US
dc.titleFlavonoids, phenolic acids and abscisic acid in Australian and New Zealand Leptospermum honeysen_US
dc.description.peerreviewedPeer revieweden_US
dc.contributor.funderRural Industries Research and Development Corporation (Australia)-
dc.contributor.funderAustralian Government-
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