title: Chemical composition and antioxidant activity of yerba-mate (Ilex paraguariensis A.St.-Hil., Aquifoliaceae) extract as obtained by spray drying.
abstract: Yerba-mate or maté (Ilex paraguariensis A.St.-Hil., Aquifoliaceae) leaves are typically used for their stimulant, antioxidant, antimicrobial, and diuretic activity, presenting as principal components polyphenolic compounds. In this study, the objective was to develop a yerba-mate dry extract by using spray drying technology and to evaluate the dry extract antioxidant activity and chemical composition. The results obtained by means of the DPPH assay show that the extract presents an IC(50) of 2.52 mg/mL. The yerba-mate spray-dried extract presents high catalase-like activity, suggesting that it is a strong free-radical scavenger. The antioxidant activity as expressed as catalase-like activity was related to total polyphenol content. In addition, the results show that the spray-dried extract presents high polyphenol content, namely, high concentrations of caffeic acid (1.54 mg/g), 5-caffeoylquinic acid (91.40 mg/g), rutin (5.38 mg/g), and total phenolics (178.32 mg/g), which justifies its high antioxidant activity.
authors.affiliation: Department of Food Technology-PPGTA, Federal University of Paraná, Curitiba, PR, Brazil. kleber.berte@gmail.com
authors.forename: Kleber A S
authors.initials: KA
authors.lastname: Berté
authors.forename: Marcia R
authors.initials: MR
authors.lastname: Beux
authors.forename: Patricia K W D S
authors.initials: PK
authors.lastname: Spada
authors.forename: Mirian
authors.initials: M
authors.lastname: Salvador
authors.forename: Rosemary
authors.initials: R
authors.lastname: Hoffmann-Ribani
mesh_terms: D000975:Antioxidants / Q000032:analysis*; D002374:Catalase; D002851:Chromatography, High Pressure Liquid; D003890:Desiccation / Q000379:methods; D005419:Flavonoids / Q000032:analysis; D030019:Ilex paraguariensis / Q000737:chemistry*; D010636:Phenols / Q000032:analysis; D010936:Plant Extracts / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry; D059808:Polyphenols
chemical_list: D000975:Antioxidants; D005419:Flavonoids; D010636:Phenols; D010936:Plant Extracts; D059808:Polyphenols; D002374:Catalase