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Article: Phenolic antioxidants (hydrolyzable tannins, flavonols, and anthocyanins) identified by LC-ESI-MS and MALDI-QIT-TOF MS from Rosa chinensis flowers

TitlePhenolic antioxidants (hydrolyzable tannins, flavonols, and anthocyanins) identified by LC-ESI-MS and MALDI-QIT-TOF MS from Rosa chinensis flowers
Authors
KeywordsAnthocyanins
Antioxidants
Flavonoids
Flavonols
Hydrolyzable tannins
LC-ESI-MS
MALDI-QIT-TOF MS
Phenolics
Rosa chinensis
Rose
Issue Date2005
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/jafcau
Citation
Journal Of Agricultural And Food Chemistry, 2005, v. 53 n. 26, p. 9940-9948 How to Cite?
AbstractRosa chinensis (Yuejihua) is a well-known ornamental plant, and its flowers are commonly used in traditional Chinese medicine. Methanolic crude extracts of dried R. chinensis flowers were used for simultaneous determination of phenolic constituents by liquid chromatography-mass spectrometry (LC-MS) and matrix-assisted laser desorption/ionization quadrupole ion trap time-of-flight mass spectrometry (MALDI-QIT-TOF MS). A total of 36 known and unknown phenolics were identified as hydrolyzable tannins, flavonols, and anthocyanins, mainly including gallotannins (mono-, di-, or trigalloylglucopyranosides), ellagitannins, quercetin, quercetin/kaempferol mono- and diglycosides, and cyanidin/pelargonidin diglycosides. MALDI-QIT-TOF MS was applied not only to verify most phenolics isolated and identified by LC-MS but also to tentatively identify two ellagitannins (rugosins B and C) not isolated and unidentified by LC-MS. This study is the first to demonstrate the rapid and successful use of MALDI-QIT-TOF MS and LC-MS to directly and simultaneously identify phenolics in the crude extracts of R. chinensis flowers without any purification. The antioxidant activity of the crude extracts from R. chinensis flowers was also measured with three assay methods. The results showed that the phenolic antioxidants from R. chinensis flowers exhibited very strong radical scavenging effect and antioxidant power. High levels of flavonols and hydrolyzable tannins might be important bioactive principles in the dried R. chinensis flowers. © 2005 American Chemical Society.
Persistent Identifierhttp://hdl.handle.net/10722/68739
ISSN
2015 Impact Factor: 2.857
2015 SCImago Journal Rankings: 1.246
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorCai, YZen_HK
dc.contributor.authorXing, Jen_HK
dc.contributor.authorSun, Men_HK
dc.contributor.authorZhan, ZQen_HK
dc.contributor.authorCorke, Hen_HK
dc.date.accessioned2010-09-06T06:07:12Z-
dc.date.available2010-09-06T06:07:12Z-
dc.date.issued2005en_HK
dc.identifier.citationJournal Of Agricultural And Food Chemistry, 2005, v. 53 n. 26, p. 9940-9948en_HK
dc.identifier.issn0021-8561en_HK
dc.identifier.urihttp://hdl.handle.net/10722/68739-
dc.description.abstractRosa chinensis (Yuejihua) is a well-known ornamental plant, and its flowers are commonly used in traditional Chinese medicine. Methanolic crude extracts of dried R. chinensis flowers were used for simultaneous determination of phenolic constituents by liquid chromatography-mass spectrometry (LC-MS) and matrix-assisted laser desorption/ionization quadrupole ion trap time-of-flight mass spectrometry (MALDI-QIT-TOF MS). A total of 36 known and unknown phenolics were identified as hydrolyzable tannins, flavonols, and anthocyanins, mainly including gallotannins (mono-, di-, or trigalloylglucopyranosides), ellagitannins, quercetin, quercetin/kaempferol mono- and diglycosides, and cyanidin/pelargonidin diglycosides. MALDI-QIT-TOF MS was applied not only to verify most phenolics isolated and identified by LC-MS but also to tentatively identify two ellagitannins (rugosins B and C) not isolated and unidentified by LC-MS. This study is the first to demonstrate the rapid and successful use of MALDI-QIT-TOF MS and LC-MS to directly and simultaneously identify phenolics in the crude extracts of R. chinensis flowers without any purification. The antioxidant activity of the crude extracts from R. chinensis flowers was also measured with three assay methods. The results showed that the phenolic antioxidants from R. chinensis flowers exhibited very strong radical scavenging effect and antioxidant power. High levels of flavonols and hydrolyzable tannins might be important bioactive principles in the dried R. chinensis flowers. © 2005 American Chemical Society.en_HK
dc.languageengen_HK
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/jafcauen_HK
dc.relation.ispartofJournal of Agricultural and Food Chemistryen_HK
dc.subjectAnthocyaninsen_HK
dc.subjectAntioxidantsen_HK
dc.subjectFlavonoidsen_HK
dc.subjectFlavonolsen_HK
dc.subjectHydrolyzable tanninsen_HK
dc.subjectLC-ESI-MSen_HK
dc.subjectMALDI-QIT-TOF MSen_HK
dc.subjectPhenolicsen_HK
dc.subjectRosa chinensisen_HK
dc.subjectRoseen_HK
dc.subject.meshAnthocyanins - analysis-
dc.subject.meshAntioxidants - analysis-
dc.subject.meshFlavonols - analysis-
dc.subject.meshRosa - chemistry-
dc.subject.meshTannins - analysis-
dc.titlePhenolic antioxidants (hydrolyzable tannins, flavonols, and anthocyanins) identified by LC-ESI-MS and MALDI-QIT-TOF MS from Rosa chinensis flowersen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0021-8561&volume=53&issue=26&spage=9940&epage=9948&date=28&atitle=Phenolic+antioxidants+(hydrolyzable+tannins,+flavonols,+and+anthocyanins)+identified+by+LC-ESI-MS+and+MALDI-QIT-TOF+MS+from+Rosa+chinensis+flowersen_HK
dc.identifier.emailCai, YZ: yzcai@hkucc.hku.hken_HK
dc.identifier.emailSun, M: meisun@hkucc.hku.hken_HK
dc.identifier.emailCorke, H: harold@hku.hken_HK
dc.identifier.authorityCai, YZ=rp00661en_HK
dc.identifier.authoritySun, M=rp00779en_HK
dc.identifier.authorityCorke, H=rp00688en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/jf052137ken_HK
dc.identifier.pmid16366678-
dc.identifier.scopuseid_2-s2.0-30544445357en_HK
dc.identifier.hkuros115797en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-30544445357&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume53en_HK
dc.identifier.issue26en_HK
dc.identifier.spage9940en_HK
dc.identifier.epage9948en_HK
dc.identifier.isiWOS:000234259700015-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridCai, YZ=8684149300en_HK
dc.identifier.scopusauthoridXing, J=37162498100en_HK
dc.identifier.scopusauthoridSun, M=7403181447en_HK
dc.identifier.scopusauthoridZhan, ZQ=16644475000en_HK
dc.identifier.scopusauthoridCorke, H=7007102942en_HK

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