Phenolic Characterization, Melanoidins, and Antioxidant Activity of Some Commercial Coffees from Coffea arabica and Coffea canephora

Coffee phenols were identified, quantified and correlated with antioxidant activity determined by the ABTS•+ (2,2’-azinobis(3-ethylbenzothiazoline-6-sulphonic acid)) and DPPH• (2,2-diphenyl -1-picrylhydrazyl radical) assays. Melanoidins (Maillard reaction products) were determined for green and processed coffee. For green Arabica beans and its products, results suggest that roasting decreases antioxidantactivity. However, torrefacto roasted coffee showed greater antioxidant activity than Caracoli beans. Instant coffee showed greater antioxidant activity than green Robusta beans by both assays. A high correlation was found between antioxidant activity and melanoidins, total phenols, caffeic acid, and caffeine.

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Bibliographic Details
Main Authors: Pérez-Hernández,Lucía Margarita, Chávez-Quiroz,Karla, Medina-Juárez,Luis Ángel, Gámez Meza,Nohemí
Format: Digital revista
Language:English
Published: Sociedad Química de México A.C. 2012
Online Access:http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1870-249X2012000400012
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Summary:Coffee phenols were identified, quantified and correlated with antioxidant activity determined by the ABTS•+ (2,2’-azinobis(3-ethylbenzothiazoline-6-sulphonic acid)) and DPPH• (2,2-diphenyl -1-picrylhydrazyl radical) assays. Melanoidins (Maillard reaction products) were determined for green and processed coffee. For green Arabica beans and its products, results suggest that roasting decreases antioxidantactivity. However, torrefacto roasted coffee showed greater antioxidant activity than Caracoli beans. Instant coffee showed greater antioxidant activity than green Robusta beans by both assays. A high correlation was found between antioxidant activity and melanoidins, total phenols, caffeic acid, and caffeine.