Title: When machine tastes coffee : an instrumental approach to predict the sensory profile of espresso coffee
Authors : Lindinger, Christian
Labbe, David
Pollien, Philippe
Rytz, Andreas
Juillerat, Marcel A.
Yeretzian, Chahan
Blank, Imre
Published in : Analytical Chemistry
Volume(Issue) : 80
Issue : 5
Pages : 1574
Pages to: 1581
Publisher / Ed. Institution : American Chemical Society
Publisher / Ed. Institution: Columbus
Issue Date: 26-Jan-2008
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
Language : English
Subjects : Proton-transfer-reaction mass-spectrometry (ptr-ms); Sensory; Coffee; Analytical
Subject (DDC) : 663: Beverage technology
Abstract: A robust and reproducible model was developed to predict the sensory profile of espresso coffee from instrumental headspace data. The model is derived from 11 different espresso coffees and validated using 8 additional espressos. The input of the model consists of (i) sensory profiles from a trained panel and (ii) on-line protontransfer reaction mass spectrometry (PTR-MS) data. The experimental PTR-MS conditions were designed to simulate those for the sensory evaluation. Sixteen characteristic ion traces in the headspace were quantified by PTR-MS, requiring only 2 min of headspace measurement per espresso. The correlation is based on a knowledge-based standardization and normalization of both datasets that selectively extracts differences in the quality of samples, while reducing the impact of variations on the overall intensity of coffees. This work represents a significant progress in terms of correlation of sensory with instrumental results exemplified on coffee.
Departement: Life Sciences und Facility Management
Organisational Unit: Institute of Chemistry and Biotechnology (ICBT)
Publication type: Article in scientific Journal
DOI : 10.1021/ac702196z
ISSN: 1520-6882
URI: https://digitalcollection.zhaw.ch/handle/11475/5455
Appears in Collections:Publikationen Life Sciences und Facility Management

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