title: Fluorescence markers in some New Zealand honeys.
abstract: The fluorescence characteristics of various New Zealand honeys were investigated to establish if this technique might detect signatures unique to manuka (Leptospermum scoparium) and kanuka (Kunzea ericoides) honeys. We found unique fluorescence profiles for these honeys which distinguished them from other New Zealand honey floral types. Two excitation-emission (ex-em) marker wavelengths each for manuka and kanuka honeys were identified; manuka honey at 270-365 (MM1) and 330-470 (MM2) nm and kanuka honey at 275-305 (KM1) and 445-525 (KM2) nm. Dilution of manuka and kanuka honeys with other honey types that did not possess these fluorescence profiles resulted in a proportional reduction in fluorescence signal of the honeys at the marker wavelengths. By comparison, rewarewa (Knightia excelsa), kamahi (Weinmannia racemosa), and clover (Trifolium spp.) honeys did not exhibit unique fluorescence patterns. These findings suggests that a fluorescence-based screening approach has potential utility for determining the monoflorality status of manuka and kanuka honeys.
authors: School of Biological Sciences and Institute for Innovation in Biotechnology, University of Auckland, PB92019 Auckland, New Zealand.
authors: Jessie
authors: J
authors: Bong
authors: School of Biological Sciences and Institute for Innovation in Biotechnology, University of Auckland, PB92019 Auckland, New Zealand.
authors: Kerry M
authors: KM
authors: Loomes
authors: School of Biological Sciences and Institute for Innovation in Biotechnology, University of Auckland, PB92019 Auckland, New Zealand; Comvita NZ Limited, Wilson South Road, Paengaroa, PB1, Te Puke, New Zealand.
authors: Ralf C
authors: RC
authors: Schlothauer
authors: School of Biological Sciences and Institute for Innovation in Biotechnology, University of Auckland, PB92019 Auckland, New Zealand; Comvita NZ Limited, Wilson South Road, Paengaroa, PB1, Te Puke, New Zealand. Electronic address: jonathan.stephens@comvita.com.
authors: Jonathan M
authors: JM
authors: Stephens
mesh_terms: D035264:Flowers / Q000145:classification; D005453:Fluorescence; D006722:Honey / Q000032:analysis* / Q000145:classification*; D031648:Kunzea; D031649:Leptospermum; D009520:New Zealand; D011058:Pollen / Q000737:chemistry; D013050:Spectrometry, Fluorescence / Q000379:methods*
keywords: Fluorescence; Honey; Kanuka (Kunzea ericoides); Manuka (Leptospermum scoparium); Nectar