title: Analysis of the stable free radical scavenging capability of artificial polyphenol mixtures and plant extracts by capillary electrophoresis and liquid chromatography-diode array detection-tandem mass spectrometry.
abstract: The oxidation process of phenolic compounds of an artificial mixture consisting of six polyphenols and the extract of eggplant (Solanum melongena) skin was monitored by using capillary zone electrophoresis and liquid chromatography-diode array detection-tandem mass spectrometry. The methods developed enabled simultaneous evaluation of the antioxidative capability of each compound. The above oxidation process was carried out using two radicals, viz. the 2,2-diphenyl-1-picrylhydrazyl and hydroxyl radicals generated via the Fenton reaction. The radical scavenging effects of artificial and natural polyphenol mixtures were compared.
authors.affiliation: Department of Chemistry, Faculty of Science, Tallinn University of Technology, Tallinn, Estonia. helmja@staff.ttu.ee
authors.forename: Kati
authors.initials: K
authors.lastname: Helmja
authors.forename: Merike
authors.initials: M
authors.lastname: Vaher
authors.forename: Tõnu
authors.initials: T
authors.lastname: Püssa
authors.forename: Mihkel
authors.initials: M
authors.lastname: Kaljurand
mesh_terms: D001713:Biphenyl Compounds / Q000378:metabolism; D002853:Chromatography, Liquid / Q000379:methods*; D002934:Cinnamates / Q000378:metabolism; D019075:Electrophoresis, Capillary / Q000379:methods*; D005419:Flavonoids / Q000378:metabolism*; D016166:Free Radical Scavengers / Q000378:metabolism*; D010636:Phenols / Q000378:metabolism*; D010851:Picrates / Q000378:metabolism; D010936:Plant Extracts / Q000378:metabolism*; D059808:Polyphenols; D032323:Solanum melongena / Q000737:chemistry; D013267:Stilbenes / Q000378:metabolism; D053719:Tandem Mass Spectrometry / Q000379:methods*
chemical_list: D001713:Biphenyl Compounds; D002934:Cinnamates; D005419:Flavonoids; D016166:Free Radical Scavengers; D010636:Phenols; D010851:Picrates; D010936:Plant Extracts; D059808:Polyphenols; D013267:Stilbenes; C004931:1,1-diphenyl-2-picrylhydrazyl