title: Evaluation of the free radical scavenging capability of wheat extracts by capillary electrophoresis and multivariate curve resolution.
abstract: In the current work, phenolic acids were analysed and their radical scavenging activity evaluated by CE, including the quantification of overlapping peaks by applying the multivariate curve resolution (MCR) method. To investigate radical scavenging activity, the solution of phenolic acids was treated with a stable free 2,2-diphenyl-1-picrylhydrazyl radical of different concentrations and the radical scavenging activity of the reaction mixture was monitored. The radical scavenging reaction was also applied to wheat bran extracts. The overlapping peaks on the electropherograms of both mixtures of standard compounds and extracts of different wheat bran varieties were resolved by using the MCR method, assuming that the overlapping compounds have different UV spectra. MCR enabled the insufficient resolution between syringic and ferulic acids to be effectively resolved.
authors.affiliation: Department of Chemistry, Faculty of Science, Tallinn University of Technology, Akadeemiatee 15, 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: Mihkel
authors.initials: M
authors.lastname: Kaljurand
mesh_terms: D000465:Algorithms; D001713:Biphenyl Compounds / Q000737:chemistry / Q000378:metabolism; D019075:Electrophoresis, Capillary / Q000379:methods*; D016166:Free Radical Scavengers / Q000032:analysis / Q000494:pharmacology*; D062385:Hydroxybenzoates / Q000032:analysis / Q000494:pharmacology*; D015999:Multivariate Analysis; D010084:Oxidation-Reduction; D010851:Picrates / Q000737:chemistry / Q000378:metabolism; D010936:Plant Extracts / Q000737:chemistry* / Q000494:pharmacology*; D025341:Principal Component Analysis; D015203:Reproducibility of Results; D012639:Seeds / Q000737:chemistry; D014908:Triticum / Q000737:chemistry*
chemical_list: D001713:Biphenyl Compounds; D016166:Free Radical Scavengers; D062385:Hydroxybenzoates; D010851:Picrates; D010936:Plant Extracts; C004931:1,1-diphenyl-2-picrylhydrazyl