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https://doi.org/10.21256/zhaw-4223| Publication type: | Article in scientific journal |
| Type of review: | Peer review (publication) |
| Title: | From the green bean to the cup of coffee : investigating coffee roasting by on-line monitoring of volatiles |
| Authors: | Yeretzian, Chahan Jordan, Alfons Badoud, Raphael Lindinger, Werner |
| DOI: | 10.21256/zhaw-4223 10.1007/s00217-001-0424-7 |
| Published in: | European Food Research and Technology |
| Volume(Issue): | 214 |
| Issue: | 2 |
| Page(s): | 92 |
| Pages to: | 104 |
| Issue Date: | Feb-2002 |
| Publisher / Ed. Institution: | Springer |
| ISSN: | 1438-2377 1438-2385 |
| Language: | English |
| Subjects: | Coffee; PTR-MS; Aroma |
| Subject (DDC): | 663: Beverage technology |
| Abstract: | Volatile organic compounds (VOCs), emitted from green coffee beans, during coffee roasting and from a cup of coffee, were all analysed by proton-transferreaction mass spectrometry. Firstly, the headspace (HS) of green beans was investigated. Alcohols dominate the HS, but aldehydes, hydrocarbons and organic acids were also abundant. Secondly, we roasted coffee under two different conditions and monitored on-line the VOCs emitted during the process. In a first roasting series, a batch of beans was roasted. After an initial drying phase, dominated by evaporation of water and methanol, the HS concentrations of VOCs such as acetic acid, acetaldehyde, pyridine and methylbutanal rapidly increased and went through a maximum at medium roast level. In a second series, just six beans were roasted. We observed sporadic bursts of some volatiles (furans, butanal, 2,3- pentanedione), coinciding with popping sounds. Other VOCs showed smooth time-intensity profiles (pyridine, pyrazine). These experiments gave a real-time insight into the complex processes taking place during roasting. Finally, the HS of coffee extracts, prepared from beans roasted to different roast levels, were analysed. Most VOCs showed a maximum concentration at medium roast level (e.g. pentanedione, furfural, 5-methyl furfural), while others showed a gradual increase (e.g. pyrrol) or decrease (e.g. methanol). |
| Further description: | Erworben im Rahmen der Schweizer Nationallizenzen (http://www.nationallizenzen.ch) |
| URI: | https://digitalcollection.zhaw.ch/handle/11475/5568 |
| Fulltext version: | Published version |
| License (according to publishing contract): | Licence according to publishing contract |
| Departement: | Life Sciences and Facility Management |
| Organisational Unit: | Institute of Chemistry and Biotechnology (ICBT) |
| Appears in collections: | Publikationen Life Sciences und Facility Management |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| 2002_Yeretzian_From the green bean to the cup of coffee_Eur Food Res Technol.pdf | 486.3 kB | Adobe PDF |  View/Open |
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Yeretzian, C., Jordan, A., Badoud, R., & Lindinger, W. (2002). From the green bean to the cup of coffee : investigating coffee roasting by on-line monitoring of volatiles. European Food Research and Technology, 214(2), 92–104. https://doi.org/10.21256/zhaw-4223
Yeretzian, C. et al. (2002) ‘From the green bean to the cup of coffee : investigating coffee roasting by on-line monitoring of volatiles’, European Food Research and Technology, 214(2), pp. 92–104. Available at: https://doi.org/10.21256/zhaw-4223.
C. Yeretzian, A. Jordan, R. Badoud, and W. Lindinger, “From the green bean to the cup of coffee : investigating coffee roasting by on-line monitoring of volatiles,” European Food Research and Technology, vol. 214, no. 2, pp. 92–104, Feb. 2002, doi: 10.21256/zhaw-4223.
YERETZIAN, Chahan, Alfons JORDAN, Raphael BADOUD und Werner LINDINGER, 2002. From the green bean to the cup of coffee : investigating coffee roasting by on-line monitoring of volatiles. European Food Research and Technology. Februar 2002. Bd. 214, Nr. 2, S. 92–104. DOI 10.21256/zhaw-4223
Yeretzian, Chahan, Alfons Jordan, Raphael Badoud, and Werner Lindinger. 2002. “From the Green Bean to the Cup of Coffee : Investigating Coffee Roasting by On-Line Monitoring of Volatiles.” European Food Research and Technology 214 (2): 92–104. https://doi.org/10.21256/zhaw-4223.
Yeretzian, Chahan, et al. “From the Green Bean to the Cup of Coffee : Investigating Coffee Roasting by On-Line Monitoring of Volatiles.” European Food Research and Technology, vol. 214, no. 2, Feb. 2002, pp. 92–104, https://doi.org/10.21256/zhaw-4223.
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