Abstract
The total antioxidant activity of coffee beverages was measured with stabilized radical EPR spectroscopy. Depending on which stabilized radical is used, Fremy's salt (potassium nitrosodisulphonate) or 2,2,6,6-tetramethyl-1-piperidin-1-oxyl (TEMPO) values can differ significantly. For the determination of antioxidant activity of Maillard reaction products in coffee, TEMPO appears to be the better radical marker. Thus the contribution of both main antioxidant active compounds (polyphenols, melanoidins) whose ratio varies with roasting conditions could be estimated. During storage experiments of coffees brews changes in antioxidant action are found to be time dependent. The content of chlorogenic acids increased significantly at higher storage temperatures, probably caused by a release from polymer structures. Additional antioxidant capacity of coffee melanoidins seems to be strongly influenced by atmospheric oxygen. The higher roasted sample is less vulnerable than medium or light roasted coffee. Investigations with model systems showed that among all coffee constituents the carbohydrates are mainly responsible for the formation of oxygen scavenging substances.
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References
Daglia M, Papetti A, Gregotti C, Bertè F, Gazzani G (2000) J Agric Food Chem 48:1449–1454
Borelli CR, Visconti A, Mennella C, Anese M, Fogliano V (2002) J Agric Food Chem 50:6527–6533
Charurin P, Ames JM, Del Castillo MD (2002) J Agric Food Chem 50:3751–3756
Del Castillo MD, Ames JM, Gordon MH (2002) J Agric Food Chem 50:3698–3703
Steinhart H, Luger A, Piost J (2001) Proceedings of 19th International Scientific Colloquium on Coffee, Trieste 14.-18.5.2001
Anese M, Nicoli MC (2003) J Agric Food Chem 51:942–946
Richelle M, Tavazzi I, Offord E (2001) J Agric Food Chem 49:3438–3442
Sánchez-González I, Jiménez-Escrig A, Saura-Calixto F (2005) Food Chem 90:133–139
Nicoli MC, Anese M, Manzocco L, Lerici CR (1997) Lebensm Wiss u Technol 30:292–298
Delgado-Andrade C, Morales FJ (2005) J Agric Food Chem 53:1403–1407
Gonis J, Hewitt DG, Troup G, Hutton DR, Hunter CR (1995) Free Radic Res 23:393–399
Goodman BA, Glidewell SM, Deighton N, Morrice AE (1994) Food Chem 51:399–403
Müller J, Rösch D, Kroh LW (2004) Elektronenspinresonanzspektroskopie. In Baltes W, Kroh LW (eds) B. Behrs Verlag, Hamburg, Schnellmethoden zur Beurteilung von Lebensmitteln und ihren Rohstoffen
Rösch D, Bergmann M, Knorr D, Kroh LW (2003) J Agric Food Chem 51:4233–4239
Singleton VL, Orthofer R, Lamucia-Raventos RM (1999) Methods Enzymol 299:152–178
Rohn S, Rawel HM, Kroll J (2004) J Agric Food Chem 52:4725–4729
Hofmann T, Bors W, Stettmaier K (1999) J Agric Food Chem 47:391–396
Montavon P, Mauron A-F, Duruz E (2003) J Agric Food Chem 51:2335–2343
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Nunes FM, Coimbra MA (2001) J Agric Food Chem 49:1773–1782
Montavon P, Duruz E, Rumo G, Pratz G (2003) J Agric Food Chem 51:2328–2334
Wen X, Enokizo A, Hattori H, Kobayashi S, Murata M, Homma S (2005) J Agric Food Chem 53:2684–2689
Akagawa M. Shigemitsu T, Suyama K (2003) Biosci Biotechnol Biochem 67:2632–2640
Hiramoto K, Kida T, Kikugawa K (2002) Biol Pharm Bull 25:1467–1471
Redgwell RJ, Trovato V, Curti D, Fischer M (2002) Carbohydr Res 337:421–431
Hofmann T, Schieberle P (2002) J Agric Food Chem 50:319–326
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Nestlé Research Centre Lousanne (Switzerland) is thanked for providing coffee samples.
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Cämmerer, B., Kroh, L.W. Antioxidant activity of coffee brews. Eur Food Res Technol 223, 469–474 (2006). https://doi.org/10.1007/s00217-005-0226-4
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DOI: https://doi.org/10.1007/s00217-005-0226-4