Can we measure the freshness of roasted coffee?

Schönbächler, Barbara; Glöss, Alexia N.; Wellinger, Marco; Klopprogge, Babette; Rast, Markus; Deuber, Louis; Yeretzian, Chahan

Publication type:	Conference paper
Type of review:	Not specified
Title:	Can we measure the freshness of roasted coffee?
Authors:	Schönbächler, Barbara Glöss, Alexia N. Wellinger, Marco Klopprogge, Babette Rast, Markus Deuber, Louis Yeretzian, Chahan
Page(s):	271
Pages to:	275
Conference details:	24th International Conference on Coffee Science, San José, Costa Rica, 12-16 November 2012
Issue Date:	2012
Publisher / Ed. Institution:	Association pour la Science et l'information sur le café
Publisher / Ed. Institution:	Paris
ISBN:	9782900212233
Language:	English
Subjects:	Shelf life; Coffee; Freshness
Subject (DDC):	663: Beverage technology
Abstract:	We analysed different freshness indices with HS GC-MS (ratios of distinct aroma molecules) for coffee packed in different materials. Whole beans packed in non-airtight packagings had a shelf life of smaller than two months, whereas for airtight packed coffees, the ratios did not change significantly with time up to almost one year, except the dimethyl disulfide/ methanethiol ratio, showing an intrinsic decomposition of the aroma of coffee with time. This temporal evolution results from the transformation of methanethiol to dimethyl disulphide, reflecting the freshness of coffee the best. Capsule systems are airtight up to approximately 40 weeks of storage time.
URI:	https://digitalcollection.zhaw.ch/handle/11475/5506
Fulltext version:	Published version
License (according to publishing contract):	Licence according to publishing contract
Departement:	Life Sciences and Facility Management
Appears in collections:	Publikationen Life Sciences und Facility Management

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Schönbächler, B., Glöss, A. N., Wellinger, M., Klopprogge, B., Rast, M., Deuber, L., & Yeretzian, C. (2012). Can we measure the freshness of roasted coffee? [Conference paper]. 24th International Conference on Coffee Science, San José, Costa Rica, 12-16 November 2012, 271–275.

Schönbächler, B. et al. (2012) ‘Can we measure the freshness of roasted coffee?’, in 24th International Conference on Coffee Science, San José, Costa Rica, 12-16 November 2012. Paris: Association pour la Science et l’information sur le café, pp. 271–275.

B. Schönbächler et al., “Can we measure the freshness of roasted coffee?,” in 24th International Conference on Coffee Science, San José, Costa Rica, 12-16 November 2012, 2012, pp. 271–275.

SCHÖNBÄCHLER, Barbara, Alexia N. GLÖSS, Marco WELLINGER, Babette KLOPPROGGE, Markus RAST, Louis DEUBER und Chahan YERETZIAN, 2012. Can we measure the freshness of roasted coffee? In: 24th International Conference on Coffee Science, San José, Costa Rica, 12-16 November 2012. Conference paper. Paris: Association pour la Science et l’information sur le café. 2012. S. 271–275. ISBN 9782900212233

Schönbächler, Barbara, Alexia N. Glöss, Marco Wellinger, Babette Klopprogge, Markus Rast, Louis Deuber, and Chahan Yeretzian. 2012. “Can We Measure the Freshness of Roasted Coffee?” Conference paper. In 24th International Conference on Coffee Science, San José, Costa Rica, 12-16 November 2012, 271–75. Paris: Association pour la Science et l’information sur le café.

Schönbächler, Barbara, et al. “Can We Measure the Freshness of Roasted Coffee?” 24th International Conference on Coffee Science, San José, Costa Rica, 12-16 November 2012, Association pour la Science et l’information sur le café, 2012, pp. 271–75.