title: Absorption and desorption behaviour of the flavonoids from Glycyrrhiza glabra L. leaf on macroporous adsorption resins.
abstract: The kinetics of adsorption and desorption behaviours of five macroporous resins for enriching flavonoids from Glycyrrhizaglabra L. leaf were investigated. All five resins showed similar and effective adsorption and desorption properties. A pseudo-second-order kinetics model was suitable for evaluating the whole adsorption process. Additionally, two representative resins (XAD-16 and SP825) were chosen for adsorption thermodynamics study. The adsorption of the representative resins was an exothermic and physical adsorption process. Further column chromatography of XAD-16 and SP825 showed that the total flavonoids (from 16.8% to 55.6% by XAD-16 and to 53.9% by SP825) and pinocembrin (from 5.49% to 15.2% by XAD-16 and to 19.8% by SP825) were enriched in 90% ethanol fractions. Meanwhile, the antioxidant capacities and nitrite-scavenging capacities were 2-3times higher than those of the crude extract. The fractions with high flavonoid and pinocembrin contents could be used as biologically active ingredients in functional food.
authors.affiliation: College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Dong
authors.affiliation: College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, China; Pulp & Paper Engineering State Key Laboratory, South China University of Technology, Guangzhou 510640, China.
authors.forename: Mouming
authors.initials: M
authors.lastname: Zhao
authors.affiliation: College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, China.
authors.forename: Dongxiao
authors.initials: D
authors.lastname: Sun-Waterhouse
authors.affiliation: College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, China.
authors.forename: Mingzhu
authors.initials: M
authors.lastname: Zhuang
authors.affiliation: College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, China.
authors.forename: Huiping
authors.initials: H
authors.lastname: Chen
authors.affiliation: College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, China.
authors.forename: Mengying
authors.initials: M
authors.lastname: Feng
authors.affiliation: College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, China. Electronic address: felzlin@scut.edu.cn.
authors.forename: Lianzhu
authors.initials: L
authors.lastname: Lin
mesh_terms: D000327:Adsorption; D002851:Chromatography, High Pressure Liquid; D005419:Flavonoids / Q000737:chemistry*; D016166:Free Radical Scavengers / Q000737:chemistry; D006035:Glycyrrhiza / Q000737:chemistry* / Q000378:metabolism; D007700:Kinetics; D010936:Plant Extracts / Q000737:chemistry; D018515:Plant Leaves / Q000737:chemistry / Q000378:metabolism; D016062:Porosity; D012117:Resins, Synthetic / Q000737:chemistry*; D013816:Thermodynamics
chemical_list: D005419:Flavonoids; D016166:Free Radical Scavengers; D010936:Plant Extracts; D012117:Resins, Synthetic
keywords: Adsorption behaviours; Flavonoids; Macroporous adsorption resins; Pinocembrin