title: Extraction of phenolic compounds from grapes and their pomace using β-cyclodextrin.
abstract: Use of aqueous cyclodextrins (CD) for recovery of selected bioactive phenolic compounds from grapes and their pomace was evaluated. When α, β and γ forms of CD were compared, β-CD was the most effective in recovering stilbenes, flavonols, and flavan-3-ols from grape pomace. The maximum quantified phenolics were obtained from the powder and the slurry of grape pomace when extracted with 2.5% (w/v) aqueous β-CD solutions at 60°C for 12-24h. With β-CD, total quantified phenolics obtained from the dry powder were 123 mg/100g (DW) while from the slurry, they were 35.8 mg/100g (FW). Incorporation of β-CD to grape mash prior to pressing for juice enhanced the recovery of phenolics in juice. Incorporation of β-CD was more effective in recovering flavan-3-ols than flavonols. Aqueous CD can effectively be used in recovering phenolics from by-products of fruit processing and therefore for functional foods and nutraceutical applications.
authors.affiliation: Department of Environmental Sciences, Nova Scotia Agricultural College, Truro, Nova Scotia, Canada B2N 5E3.
authors.forename: Charmila C
authors.initials: CC
authors.lastname: Ratnasooriya
authors.forename: H P Vasantha
authors.initials: HP
authors.lastname: Rupasinghe
mesh_terms: D000327:Adsorption; D005638:Fruit / Q000737:chemistry; D007220:Industrial Waste / Q000032:analysis; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification*; D059808:Polyphenols / Q000737:chemistry / Q000302:isolation & purification*; D052616:Solid Phase Extraction / Q000295:instrumentation / Q000379:methods*; D027843:Vitis / Q000737:chemistry*; D047392:beta-Cyclodextrins / Q000737:chemistry*
chemical_list: D007220:Industrial Waste; D010936:Plant Extracts; D059808:Polyphenols; D047392:beta-Cyclodextrins