| Publikationstyp: | Beitrag in wissenschaftlicher Zeitschrift |
| Art der Begutachtung: | Peer review (Publikation) |
| Titel: | Insight into the time-resolved extraction of aroma compounds during espresso coffee preparation : on-line monitoring by PTR-ToF-MS |
| Autor/-in: | Sánchez López, José Antonio Zimmermann, Ralf Yeretzian, Chahan |
| DOI: | 10.1021/ac502992k |
| Erschienen in: | Analytical Chemistry |
| Band(Heft): | 86 |
| Seite(n): | 11696 |
| Seiten bis: | 11704 |
| Erscheinungsdatum: | 2014 |
| Verlag / Hrsg. Institution: | American Chemical Society |
| Verlag / Hrsg. Institution: | Columbus |
| ISSN: | 0003-2700 1520-6882 |
| Sprache: | Englisch |
| Schlagwörter: | Extraction; Coffee |
| Fachgebiet (DDC): | 663: Getränketechnologie |
| Zusammenfassung: | Using proton-transfer-reaction time-of-flight mass-spectrometry (PTR-ToF-MS), we investigated the extraction dynamic of 95 ion traces in real time (time resolution = 1 s) during espresso coffee preparation. Fiftytwo of these ions were tentatively identified. This was achieved by online sampling of the volatile organic compounds (VOCs) in close vicinity to the coffee flow, at the exit of the extractionhose of the espresso machine (single serve capsules). Ten replicates of six different single serve coffee types were extracted to a final weight between 20−120 g, according to the recommended cup size of the respective coffee capsule (Ristretto, Espresso, and Lungo), and analyzed. The results revealed considerable differences in the extraction kinetics between compounds, which led to a fast evolution of the volatile profiles in the extract flow and consequently to an evolution of the final aroma balance in the cup. Besides exploring the time-resolved extraction dynamics of VOCs, the dynamic data also allowed the coffees types (capsules) to be distinguished from one another. Both hierarchical cluster analysis (HCA) and principal component analysis (PCA) showed full separation between the coffees types. The methodology developed provides a fast and simple means of studying the extraction dynamics of VOCs and differentiating between different coffee types. |
| URI: | https://digitalcollection.zhaw.ch/handle/11475/5341 |
| Volltext Version: | Publizierte Version |
| Lizenz (gemäss Verlagsvertrag): | Lizenz gemäss Verlagsvertrag |
| Departement: | Life Sciences und Facility Management |
| Enthalten in den Sammlungen: | Publikationen Life Sciences und Facility Management |
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Sánchez López, J. A., Zimmermann, R., & Yeretzian, C. (2014). Insight into the time-resolved extraction of aroma compounds during espresso coffee preparation : on-line monitoring by PTR-ToF-MS. Analytical Chemistry, 86, 11696–11704. https://doi.org/10.1021/ac502992k
Sánchez López, J.A., Zimmermann, R. and Yeretzian, C. (2014) ‘Insight into the time-resolved extraction of aroma compounds during espresso coffee preparation : on-line monitoring by PTR-ToF-MS’, Analytical Chemistry, 86, pp. 11696–11704. Available at: https://doi.org/10.1021/ac502992k.
J. A. Sánchez López, R. Zimmermann, and C. Yeretzian, “Insight into the time-resolved extraction of aroma compounds during espresso coffee preparation : on-line monitoring by PTR-ToF-MS,” Analytical Chemistry, vol. 86, pp. 11696–11704, 2014, doi: 10.1021/ac502992k.
SÁNCHEZ LÓPEZ, José Antonio, Ralf ZIMMERMANN und Chahan YERETZIAN, 2014. Insight into the time-resolved extraction of aroma compounds during espresso coffee preparation : on-line monitoring by PTR-ToF-MS. Analytical Chemistry. 2014. Bd. 86, S. 11696–11704. DOI 10.1021/ac502992k
Sánchez López, José Antonio, Ralf Zimmermann, and Chahan Yeretzian. 2014. “Insight into the Time-Resolved Extraction of Aroma Compounds during Espresso Coffee Preparation : On-Line Monitoring by PTR-ToF-MS.” Analytical Chemistry 86: 11696–704. https://doi.org/10.1021/ac502992k.
Sánchez López, José Antonio, et al. “Insight into the Time-Resolved Extraction of Aroma Compounds during Espresso Coffee Preparation : On-Line Monitoring by PTR-ToF-MS.” Analytical Chemistry, vol. 86, 2014, pp. 11696–704, https://doi.org/10.1021/ac502992k.
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