title: Levels of Antioxidant Activity and Fluoride Content in Coffee Infusions of Arabica, Robusta and Green Coffee Beans in According to their Brewing Methods.
abstract: Coffee is a rich source of dietary antioxidants, and this property links with the fact that coffee is one of the world's most popular beverages. Moreover, it is a source of macro- and microelements, including fluoride. The aim of this work was to determine antioxidant activity of coffee beverages and fluoride content depending on different coffee species and conditions of brewing. Three species of coffee, arabica, robusta and green coffee beans obtained from retail stores in Szczecin (Poland) were analyzed. Five different techniques of preparing drink were used: simple infusion, french press, espresso maker, overflow espresso and Turkish coffee. Antioxidant potential of coffee beverages was investigated spectrophotometrically by DPPH method. Fluoride concentrations were measured by potentiometric method with a fluoride ion-selective electrode. Statistical analysis was performed using Stat Soft Statistica 12.5. Antioxidant activity of infusions was high (71.97-83.21% inhibition of DPPH) depending on coffee species and beverage preparing method. It has been shown that the method of brewing arabica coffee and green coffee significantly affects the antioxidant potential of infusions. The fluoride concentration in the coffee infusions changed depending, both, on the species and conditions of brewing, too (0.013-0.502 mg/L). Methods of brewing didn't make a difference to the antioxidant potential of robusta coffee, which had also the lowest level of fluoride among studied species. Except overflow espresso, the fluoride content was the highest in beverages from green coffee. The highest fluoride content was found in Turkish coffee from green coffee beans.
authors.affiliation: Department of Biochemistry and Human Nutrition, Pomeranian Medical University in Szczecin, Broniewskiego 24 Street, 71-460, Szczecin, Poland.
authors.forename: J
authors.initials: J
authors.lastname: Wolska
authors.affiliation: Department of Biochemistry and Human Nutrition, Pomeranian Medical University in Szczecin, Broniewskiego 24 Street, 71-460, Szczecin, Poland. kjanda@pum.edu.pl.
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Janda
authors.affiliation: Department of Biochemistry and Human Nutrition, Pomeranian Medical University in Szczecin, Broniewskiego 24 Street, 71-460, Szczecin, Poland.
authors.forename: K
authors.initials: K
authors.lastname: Jakubczyk
authors.affiliation: Faculty of Applied Social Sciences and Resocialisation at Warsaw University, 00-503, Warsaw, Poland.
authors.forename: M
authors.initials: M
authors.lastname: Szymkowiak
authors.affiliation: Department of Biochemistry, Pomeranian Medical University in Szczecin, Powstańców Wlkp. 71 Street, 70-111, Szczecin, Poland.
authors.forename: D
authors.initials: D
authors.lastname: Chlubek
authors.affiliation: Department of Biochemistry and Human Nutrition, Pomeranian Medical University in Szczecin, Broniewskiego 24 Street, 71-460, Szczecin, Poland.
authors.forename: I
authors.initials: I
authors.lastname: Gutowska
mesh_terms: D000975:Antioxidants / Q000032:analysis* / Q000737:chemistry; D001713:Biphenyl Compounds; D003069:Coffee / Q000737:chemistry*; D003296:Cooking / Q000379:methods*; D005459:Fluorides / Q000032:analysis; D010851:Picrates; D013045:Species Specificity
chemical_list: D000975:Antioxidants; D001713:Biphenyl Compounds; D003069:Coffee; D010851:Picrates; C004931:1,1-diphenyl-2-picrylhydrazyl; D005459:Fluorides
keywords: Antioxidant activity; Coffee infusion; DPPH; Fluoride content