Application of laser ionization mass spectrometry for on-line monitoring of volatiles in the headspace of food products : roasting and brewing of coffee

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

Publication type:	Article in scientific journal
Type of review:	Peer review (publication)
Title:	Application of laser ionization mass spectrometry for on-line monitoring of volatiles in the headspace of food products : roasting and brewing of coffee
Authors:	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
Published in:	Rapid Communications in Mass Spectrometry
Volume(Issue):	10
Issue:	15
Page(s):	1975
Pages to:	1979
Issue Date:	1996
Publisher / Ed. Institution:	Wiley
Publisher / Ed. Institution:	New York
ISSN:	0951-4198 1097-0231
Language:	English
Subjects:	Coffee; Mass spectrometry; Laser ionization
Subject (DDC):	663: Beverage technology
Abstract:	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
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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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.