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  • Title: Furan levels in coffee as influenced by species, roast degree, and brewing procedures.
    Author: Arisseto AP, Vicente E, Ueno MS, Tfouni SA, Toledo MC.
    Journal: J Agric Food Chem; 2011 Apr 13; 59(7):3118-24. PubMed ID: 21388135.
    Abstract:
    Brazilian green coffee beans of Coffea arabica and Coffea canephora species were roasted to light, medium, and dark roast degrees and analyzed in relation to furan content by using an in-house validated method based on gas chromatography coupled to mass spectrometry preceded by headspace solid-phase microextraction. Furan was not detected in green coffees, whereas levels between 911 and 5852 μg/kg were found in the roasted samples. Higher concentrations were found in Coffea canephora species and darker ground coffees. Some of the potential furan precursors were observed in significant amounts in green coffee, especially sucrose and linoleic acid, but their concentrations could not be correlated to furan formation. Additionally, coffee brews were prepared from roasted ground coffees by using two different procedures, and furan levels in the beverages varied from <10 to 288 μg/kg. The factor that most influenced the furan content in coffee brew was the brewing procedure.
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