title: HPLC-DAD-ESI-MS/MS analysis and antioxidant activities of nonanthocyanin phenolics in mulberry (Morus alba L.).
abstract: Qualitative analysis of the nonanthocyanin phenolics from 2 mulberry cultivars, da-10 and hongguo, was performed by the HPLC-DAD-ESI-MS/MS method. Six nonanthocyanin phenolics compounds were identified (procatechuic acid, chlorogenic acid, 4-caffeolyquinic acid, taxifolin, rutin, quercetin) and 3 others (3,5-diCQA, taxifolin-hexoside, kamepferol-hexoside) were tentatively identified. Quantification of nonanthocyanin phenolic was performed by HPLC-DAD, which revealed that rutin (111.38 and 90.79 microg/g FW) was the major nonanthocyanin phenolics in the 2 mulberry cultivars. Phenolic acids in cultivar da-10 (54.68 microg/g FW) were far more than in cultivar hongguo (14.93 microg/g FW). CQA and its isomers (40.02 microg/g FW) were the major phenolic acid in cultivar da-10. The nonanthocyanin phenolics in the 2 cultivars of mulberry had higher antiradical activities in superoxide anion and DPPH radical and antioxidant activity in beta-CLAMS assay than the Trolox. These results were relevant to not only the control of color stability and organoleptic characteristics of mulberry juice and wine but also the exploitation of the functional foods made from mulberry.
authors.affiliation: Center for Viticulture and Enology, College of Food Science & Nutritional Engineering, China Agricultural Univ., Beijing 100083, PR China.
authors.forename: W
authors.initials: W
authors.lastname: Zhang
authors.forename: F
authors.initials: F
authors.lastname: Han
authors.forename: J
authors.initials: J
authors.lastname: He
authors.forename: C
authors.initials: C
authors.lastname: Duan
mesh_terms: D000975:Antioxidants / Q000378:metabolism*; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D005638:Fruit / Q000737:chemistry*; D062385:Hydroxybenzoates / Q000032:analysis* / Q000378:metabolism*; D013058:Mass Spectrometry / Q000379:methods; D031625:Morus / Q000737:chemistry* / Q000145:classification; D010636:Phenols / Q000737:chemistry / Q000378:metabolism; D010936:Plant Extracts / Q000737:chemistry*; D012431:Rutin / Q000032:analysis / Q000378:metabolism; D013045:Species Specificity; D021241:Spectrometry, Mass, Electrospray Ionization
chemical_list: D000975:Antioxidants; D062385:Hydroxybenzoates; D010636:Phenols; D010936:Plant Extracts; D012431:Rutin; C017616:phenolic acid