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Discrimination of roast and ground coffee aroma

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Author(s): Fisk Ian | Kettle Alec | Hofmeister Sonja | Virdie Amarjeet | Kenny Javier

Journal: Flavour
ISSN 2044-7248

Volume: 1;
Issue: 1;
Start page: 14;
Date: 2012;
Original page

Keywords: Coffee | Aroma | Flavour | Coffee brew | GC-MS | TOF-MS | Multivariate factor analysis

ABSTRACT
Abstract Background Four analytical approaches were used to evaluate the aroma profile at key stages in roast and ground coffee brew preparation (concentration within the roast and ground coffee and respective coffee brew; concentration in the headspace of the roast and ground coffee and respective brew). Each method was evaluated by the analysis of 15 diverse key aroma compounds that were predefined by odour port analysis. Results Different methods offered complimentary results for the discrimination of products; the concentration in the coffee brew was found to be the least discriminatory and concentration in the headspace above the roast and ground coffee was shown to be most discriminatory. Conclusions All approaches should be taken into consideration when classifying roast and ground coffee especially for alignment to sensory perception and consumer insight data as all offer markedly different discrimination abilities due to the variation in volatility, hydrophobicity, air-water partition coefficient and other physicochemical parameters of the key aroma compounds present.
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