Characterization of Phenolic Components in Polar Extracts of Eucalyptus globulus Labill. Bark by High-Performance Liquid Chromatography-Mass Spectrometry
authors Santos, SAO; Freire, CSR; Domingues, MRM; Silvestre, AJD; Neto, CP
nationality International
journal JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
author keywords Eucalyptus globulus Labill.; bark; phenolic compounds; flavonoids; HPLC-ESI-MS; tandem mass spectrometry
keywords MOLECULAR-WEIGHT POLYPHENOLS; E-RUDIS; HYDROLYZABLE TANNINS; STEM BARK; ACID; CAMALDULENSIS; FLAVONOL; LEAVES; WOOD; AGLYCONES
abstract High-performance liquid chromatography electrospray ionization mass spectrometry (HPLC-ESI-MS) and tandem mass spectrometry (MS") were used to investigate the phenolic constituents in methanol, water, and methanol/water extracts of Eucalyptus globulus Labill. bark. Twenty-nine phenolic compounds were identified, 16 of them referenced for the first time as constituents of E. globulus bark, namely, quinic, dihydroxyphenylacetic, and caffeic acids, bis(hexahydroxydiphenoyl (HHDP))-glucose, galloyl-bis(HHDP)-glucose, galloyl-HHDP-glucose, isorhamentin-hexoside, quercetin-hexoside, methylellagic acid (EA) pentose conjugate, myricetin-rhamnoside, isorhamnetin-rhamnoside, mearnsetin, phloridzin, mearnsetin-hexoside, luteolin, and a proanthocyanidin B-type dimer. Digalloylglucose was identified as the major compound in the methanol and methanol/water extracts, followed by isorhamnetin-rhamnoside in the methanol extract and by catechin in the methanol/water extract, whereas in the water extract catechin and galloyl- HHDP-glucose were identified as the predominant components. The methanol/water extract was shown be the most efficient to isolate phenolic compounds identified in E. globulus bark.
publisher AMER CHEMICAL SOC
issn 0021-8561
year published 2011
volume 59
issue 17
beginning page 9386
ending page 9393
digital object identifier (doi) 10.1021/jf201801q
web of science category Agriculture, Multidisciplinary; Chemistry, Applied; Food Science & Technology
subject category Agriculture; Chemistry; Food Science & Technology
unique article identifier WOS:000294585100043
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