title: Determination of chokeberry (Aronia melanocarpa) polyphenol components using liquid chromatography-tandem mass spectrometry: Overall contribution to antioxidant activity.
abstract: The type and content of plant polyphenols can be influenced by maturity. Korean chokeberry (Aronia melanocarpa) leaves of three different maturities (young, mature, and aged) were extracted with 70% aqueous methanol. The polyphenols in the leaves were analysed for the first time using high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) and comparison with reported data. Among the 12 characterised components, five flavonoids, 3, 4, and 10-12, and a dicaffeoylquinic acid derivative, 6, were characterised for the first time in chokeberry leaves. Each polyphenol component was validated and quantified using a representative polyphenol standard of the same group. The antioxidant activity of the three different mature leaf extracts was determined. The antioxidant activity was highest for young leaves, followed by mature and aged leaves. The results suggest that younger chokeberry leaves may be more favourable for processing a higher quality functional tea due to their higher polyphenol content.
authors.affiliation: Department of Chemistry and Research Institute of Life Science, Gyeongsang National University, Jinju 660-701, Republic of Korea.
authors.forename: Ji Eun
authors.initials: JE
authors.lastname: Lee
authors.forename: Gon-Sup
authors.initials: GS
authors.lastname: Kim
authors.forename: Semin
authors.initials: S
authors.lastname: Park
authors.forename: Yun-Hi
authors.initials: YH
authors.lastname: Kim
authors.forename: Man-Bae
authors.initials: MB
authors.lastname: Kim
authors.forename: Won Sup
authors.initials: WS
authors.lastname: Lee
authors.forename: Sung Woo
authors.initials: SW
authors.lastname: Jeong
authors.forename: Soo Jung
authors.initials: SJ
authors.lastname: Lee
authors.forename: Jong Sung
authors.initials: JS
authors.lastname: Jin
authors.forename: Sung Chul
authors.initials: SC
authors.lastname: Shin
mesh_terms: D000975:Antioxidants / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid; D015394:Molecular Structure; D046936:Photinia / Q000737:chemistry* / Q000254:growth & development; D010936:Plant Extracts / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry / Q000254:growth & development; D059808:Polyphenols / Q000737:chemistry*; D053719:Tandem Mass Spectrometry / Q000379:methods*
chemical_list: D000975:Antioxidants; D010936:Plant Extracts; D059808:Polyphenols
keywords: Antioxidant effect; Chokeberry; Functional food; Liquid chromatography; Polyphenol; Tandem mass spectrometry