| Publikationstyp: | Beitrag in wissenschaftlicher Zeitschrift |
| Art der Begutachtung: | Peer review (Publikation) |
| Titel: | Application of laser ionization mass spectrometry for on-line monitoring of volatiles in the headspace of food products : roasting and brewing of coffee |
| Autor/-in: | Zimmermann, Ralf Heger, Hans Jörg Yeretzian, Chahan Nagel, Holger Boesl, Ulrich |
| DOI: | 10.1002/(SICI)1097-0231(199612)10:15<1975::AID-RCM786>3.0.CO;2-X |
| Erschienen in: | Rapid Communications in Mass Spectrometry |
| Band(Heft): | 10 |
| Heft: | 15 |
| Seite(n): | 1975 |
| Seiten bis: | 1979 |
| Erscheinungsdatum: | 1996 |
| Verlag / Hrsg. Institution: | Wiley |
| Verlag / Hrsg. Institution: | New York |
| ISSN: | 0951-4198 1097-0231 |
| Sprache: | Englisch |
| Schlagwörter: | Coffee; Mass spectrometry; Laser ionization |
| Fachgebiet (DDC): | 663: Getränketechnologie |
| Zusammenfassung: | Resonance-enhanced multi-photon ionization time-of-flight mass spectrometry (REMPI/TOFMS) has been applied to the detection of volatiles in the headspace of brewed coffee and in the coffee roasting process-gas. A frequency quadrupled Nd:YAG laser (266 nm) was used for REMPI ionization (REMPI@266nm) of the volatiles in an effusive molecular beam inside the ion source of a linear TOF mass spectrometer. A special sampling system provided a time correlated sampling. Under these circumstances REMPI@266nm is highly selective for ionization of phenolic compounds. Several phenolic compounds, such as the flavour-active 4-vinylguaiacol, can be detected in the headspace of coffee brew as well as in the roast off-gas with the application of this approach. Moreover, the nitrogen heterocyclic compounds, indole and caffeine, were detected in both cases. During the roasting process the relative changes in concentration of some volatile components of coffee have been recorded by EMPI@266nm with a time resolution of 1 Hz. The different volatiles exhibit characteristic concentration profiles as a function of the roast time. These results demonstrate the applicability of REMPI-TOFMS for on-line monitoring of coffee processing technologies. Such an on-line monitoring technique is of particular interest for process-control purposes, e.g. quality-protection or feedback process control. For example, monitoring of off-gases from the coffee roast process or monitoring of certain unit operations during the instant-coffee manufacturing could be promising industrial applications. |
| URI: | https://digitalcollection.zhaw.ch/handle/11475/5447 |
| 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 |
Dateien zu dieser Ressource:
Es gibt keine Dateien zu dieser Ressource.
Zur Langanzeige
Zimmermann, R., Heger, H. J., Yeretzian, C., Nagel, H., & Boesl, U. (1996). Application of laser ionization mass spectrometry for on-line monitoring of volatiles in the headspace of food products : roasting and brewing of coffee. Rapid Communications in Mass Spectrometry, 10(15), 1975–1979. https://doi.org/10.1002/(SICI)1097-0231(199612)10:15<1975::AID-RCM786>3.0.CO;2-X
Zimmermann, R. et al. (1996) ‘Application of laser ionization mass spectrometry for on-line monitoring of volatiles in the headspace of food products : roasting and brewing of coffee’, Rapid Communications in Mass Spectrometry, 10(15), pp. 1975–1979. Available at: https://doi.org/10.1002/(SICI)1097-0231(199612)10:15<1975::AID-RCM786>3.0.CO;2-X.
R. Zimmermann, H. J. Heger, C. Yeretzian, H. Nagel, and U. Boesl, “Application of laser ionization mass spectrometry for on-line monitoring of volatiles in the headspace of food products : roasting and brewing of coffee,” Rapid Communications in Mass Spectrometry, vol. 10, no. 15, pp. 1975–1979, 1996, doi: 10.1002/(SICI)1097-0231(199612)10:15<1975::AID-RCM786>3.0.CO;2-X.
ZIMMERMANN, Ralf, Hans Jörg HEGER, Chahan YERETZIAN, Holger NAGEL und Ulrich BOESL, 1996. Application of laser ionization mass spectrometry for on-line monitoring of volatiles in the headspace of food products : roasting and brewing of coffee. Rapid Communications in Mass Spectrometry. 1996. Bd. 10, Nr. 15, S. 1975–1979. DOI 10.1002/(SICI)1097-0231(199612)10:15<1975::AID-RCM786>3.0.CO;2-X
Zimmermann, Ralf, Hans Jörg Heger, Chahan Yeretzian, Holger Nagel, and Ulrich Boesl. 1996. “Application of Laser Ionization Mass Spectrometry for On-Line Monitoring of Volatiles in the Headspace of Food Products : Roasting and Brewing of Coffee.” Rapid Communications in Mass Spectrometry 10 (15): 1975–79. https://doi.org/10.1002/(SICI)1097-0231(199612)10:15<1975::AID-RCM786>3.0.CO;2-X.
Zimmermann, Ralf, et al. “Application of Laser Ionization Mass Spectrometry for On-Line Monitoring of Volatiles in the Headspace of Food Products : Roasting and Brewing of Coffee.” Rapid Communications in Mass Spectrometry, vol. 10, no. 15, 1996, pp. 1975–79, https://doi.org/10.1002/(SICI)1097-0231(199612)10:15<1975::AID-RCM786>3.0.CO;2-X.
Alle Ressourcen in diesem Repository sind urheberrechtlich geschützt, soweit nicht anderweitig angezeigt.