Furans and other volatile compounds in ground roasted and expresso coffee using headspace solid-phase microextraction

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Petisca, Catarina (Author) Other; Pérez-Palacios, Trinidad (Author) Other; Farah, Adriana (Author) Other; Pinho, Olívia (Author) FCNAUP; Ferreira, Isabel M. P. L. V. O (Author) Other

Journal

Title: Food and Bioproducts Processing: Transactions of the Institution of of Chemical Engineers, Part C

Vol. - No. -

Pages: [1-9]

ISSN: 0960-3085

Publisher: Institution of Chemical Engineers

Scientific classification

FOS: Medical and Health sciences > Health sciences

CORDIS: Health sciences

Other information

DOI: http://dx.doi.org/10.1016/j.fbp.2012.10.003

Abstract (EN): The profile of major classes of furanic compounds, as well as other volatile compounds, was evaluated by headspace solid-phase microextraction GC/MS in Arabica ground coffee roasted at three speeds, and in their respective espresso coffees. A total of 113 and 105 volatile compounds were respectively identified in ground coffee and espresso coffee. They were clustered in the following chemical classes: furans, pyrroles, pyridines, pyrazines, ketones, hydrocarbons, aldehydes and others. Results from Principal Component Analysis (PCA) using the data of major volatile class as variables showed that the levels (expressed as relative percentage of total peak area) of furans and pyrroles were higher in espresso samples, whereas those of pyrazines and ketones were higher in ground samples. Slow roasting speed favoured pyridines formation, while medium and fast roasting speed favoured ketones formation. The most representative furanic compound in ground samples was furfuryl alcohol, followed by furfuryl acetate, 2-furfural, 2-methylfuran and 5-methylfurfural. In espresso samples, the levels of 2-methylfuran, 2-furfural, furfuryl formate, 5-methylfurfural and furfuryl acetate were largely increased while the proportion of furfuryl alcohol was strongly reduced in comparison to ground coffee. High roast speed increased formation of 2-furfural and 5-methyl furfural in espresso coffee.

Language: English

Type (Professor's evaluation): Scientific

Notes: <i> Article in press</i> , Epub 2012 Out 22. Indexação: a revista é indexada na ISI WoS (Fonte: JCR), mas o artigo em causa não se encontra indexado até Fev. 2013