Dr. Marco Wellinger

Work at ZHAW

Position at the ZHAW

Research Associate

Professional development teaching

• CAS The Science and Art of Coffee
• CAS in Coffee Excellence

Education and Continuing education

Expertise and research interests

Study of coffee aromas (PTR-ToF-MS and GC-MS), coffee sensory analysis (certified Q Grader for Arabica and Robusta) and water treatment and characterisation.

Educational background

Dr. sc. ETH Lausanne - analytical chemistry - on-line process gas analysis of green energy production from wood and straw
MSc ETH Zurich - environmental science - major in chemistry and microbiology

Projects

• Miele - Benchmarking of Full Automatic Coffee Machines / Deputy project leader / Project completed
• Thermoplan - Nachweis Marker-Verbindungen Milch / Deputy project leader / Project completed
• Melitta 1 / Deputy project leader / Project completed
• Suntory - R&D Collaboration on Coffee / Team member / Project completed
• Aroma recovery from coffee roasting / Team member / Project completed
• Development Nespresso CAS Coffee Expertise / Team member / Project completed
• Water and Coffee (BWT) / Deputy project leader / Project completed
• Conditioning of Green Coffee Prior to Roasting / Team member / Project completed
• Nespresso Coffee Knowledge / Team member / Project completed
• Modulating the Coffee Roasting Process to Optimize the Antioxidant Potential of Coffee / Team member / Project completed

Publications

• Eiermann, André; Smrke, Samo; Guélat, Loïc-Marco; Wellinger, Marco; Rahn, Anja; Yeretzian, Chahan,

  2020.

  Extraction of single serve coffee capsules : linking properties of ground coffee to extraction dynamics and cup quality.

  Scientific Reports.

  10(17079).

  Available from: https://doi.org/10.1038/s41598-020-74138-1

• Smrke, Samo; Wellinger, Marco; Suzuki, Tomonori; Balsiger, Franz; Opitz, Sebastian E. W.; Yeretzian, Chahan,

  2018.

  Time-resolved gravimetric method to assess degassing of roasted coffee.

  Journal of Agricultural and Food Chemistry.

  66(21), pp. 5293-5300.

  Available from: https://doi.org/10.1021/acs.jafc.7b03310

• Opitz, Sebastian E. W.; Goodman, Bernard A.; Keller, Marco; Smrke, Samo; Wellinger, Marco; Schenker, Stefan; Yeretzian, Chahan,

  2017.

  Understanding the effects of roasting on antioxidant components of coffee brews by coupling on-line ABTS assay to high performance size exclusion chromatography.

  Phytochemical Analysis.

  28(2), pp. 106-114.

  Available from: https://doi.org/10.1002/pca.2661

• Sánchez López, José Antonio; Wellinger, Marco; Gloess, Alexia N.; Zimmermann, Ralf; Yeretzian, Chahan,

  2016.

  Extraction kinetics of coffee aroma compounds using a semi-automatic machine : on-line analysis by PTR-ToF-MS.

  International Journal of Mass Spectrometry.

  401, pp. 22-30.

  Available from: https://doi.org/10.1016/j.ijms.2016.02.015

• Yeretzian, Chahan; Opitz, Sebastian; Smrke, Samo; Wellinger, Marco,

  2019.

  Coffee volatile and aroma compounds : from the green bean to the cup

  .

  In:

  Farah, Adriana, ed.,

  Coffee : production, quality and chemistry.

  London:

  Royal Society of Chemistry.

  pp. 726-770.

  Available from: https://doi.org/10.1039/9781782622437-00726

• Wellinger, Marco; Smrke, Samo; Yeretzian, Chahan,

  2017.

  Water for extraction : composition, recommendations, and treatment

  .

  In:

  The craft and science of coffee.

  Amsterdam:

  Elsevier.

  pp. 381-398.

  Available from: https://doi.org/10.1016/B978-0-12-803520-7.00016-5

• Wellinger, Marco; Petrozzi, Sergio; Renaud, Jean-Marc; Christlbauer, Monika; Yeretzian, Chahan,

  2015.

  On-line PTR-ToF-MS quantification of volatile aroma compounds released during tobacco heat treatment [paper].

  In:

  Taylor, A. J.; Mottram, D. S., eds.,

  Flavour Science: Proceedings of the XIV Weurman Flavour Research Symposium.

  14th Weurman Flavour Research Symposium, Cambridge, United Kingdom, 15-19 September 2014.

  Context.

  pp. 253-257.

• Kishigami, Mizue; Wellinger, Marco; Früh, Patrick; Yeretzian, Chahan,

  2018.

  Filter coffee extraction : a time-resolved view [poster].

  In:

  Specialty Coffee Expo 2018, Seattle, USA, 19-22 April 2018.

• Smrke, Samo; Sage, Emma; Wellinger, Marco; Yeretzian, Chahan,

  2018.

  The coffee freshness handbook.

  1. Auflage.

  Santa Ana:

  Specialty Coffee Association (SCA).

  ISBN 978-0-9995807-2-1.

• Wellinger, Marco; Smrke, Samo; Yeretzian, Chahan,

  2018.

  The SCA water quality handbook.

  Speciality Coffee Association.

  ISBN 978-0-9995807-3-8.

• Wellinger, Marco; Smrke, Samo; Yeretzian, Chahan,

  2017.

  The SCAE water chart : measure aim trat.

  Speciality Coffee Association of Europe.

• Sanchez Lopez, Jose; Wellinger, Marco; Gloess, Alexia; Zimmermann, Ralf; Yeretzian, Chahan,

  2016.

  Extraction kinetics of coffee aroma compounds during espresso extraction : on-line analysis by PTR-MS [paper].

  In:

  Contributions 7th International Conference on Proton Transfer Reaction Mass Spectrometry and its Applications.

  7th International Conference on Proton Transfer Reaction Mass Spectrometry and its Applications, Obergurgl, Austria, 14-19 February 2016.

  Innsbruck University Press.

• Gloess, Alexia; Wellinger, Marco; Schönbächler, Barbara; Wieland, Flurin; Lindinger, Christian; Yeretzian, Chahan,

  2013.

  Predicting the sensory profiles of coffee based on PTR-ToF-MS and GC-MS measurements [paper].

  In:

  Contributions : 6th International Conference on Proton Transfer Reaction Mass Spectrometry and ist Applications.

  6th International Conference on Proton Transfer Reaction Mass Spectrometry and ist Applications, Obergurgl, Austria, 3-8 February 2013.

  Innsbruck:

  Innsbruck University Press.

  pp. 54-57.

• Yeretzian, Chahan; Gloess, Alexia; Schönbächler, Barbara; Wellinger, Marco; Neff, Angela; Wieland, Flurin,

  2013.

  Recent applications of PTR-ToF-MS in coffee research [paper].

  In:

  6th International Conference on Proton Transfer Reaction Mass Spectrometry and its Applications.

  6th International Conference on Proton Transfer Reaction Mass Spectrometry and ist Applications, Obergurgl, Austria, 3-8 February 2013.

  Innsbruck University Press.

  pp. 67-70.

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

  2012.

  Can we measure the freshness of roasted coffee? [paper].

  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.

• Kishigami, Mizue; Wellinger, Marco; Yeretzian, Chahan,

  2018.

  Filter coffee extraction : a time-resolved view and the influence of CO2.

  In:

  27th International Conference of the Association for the Science and Information on Coffee (ASIC), Portland, USA, 16-20 September 2018.

• Wellinger, Marco; Yeretzian, Chahan,

  2018.

  SCA water quality workshop.

  In:

  Specialty Coffee Expo 2018, Seattle, USA, 19-22 April 2018.

• Eiermann, Andre; Guelat, Loic-Marco; Smrke, Samo; Wellinger, Marco; Yeretzian, Chahan,

  2018.

  Screening of parameters impacting capsule coffee extraction.

  In:

  27th International Conference of the Association for the Science and Information on Coffee (ASIC), Portland, USA, 16-20 September 2018.

• Smrke, Samo; Rahn, Anja; Wellinger, Marco; Yeretzian, Chahan,

  2018.

  The impact of coffee roasting profile on freshness markers in coffee aroma : towards a universal method to quantify coffee freshness.

  In:

  13th International Symposium of the Maillard Reaction (ISMR 13), Montreal, Canada, 10-13 September 2018.

• Yeretzian, Chahan; Smrke, Samo; Wellinger, Marco; Opitz, Sebastian,

  2017.

  Coffee roasting, blending before versus blending after roasting.

  In:

  World of Coffee 2017, Dublin, Irland, 20-23 June 2017.

• Yeretzian, Chahan; Wellinger, Marco; Smrke, Samo; Opitz, Sebastian; Früh, Patrick; Sanchez-Lopez, Jose,

  2017.

  Extraction of coffee : exploring the impact temperature, pressure and water on extraction dynamics and sensory profiles.

  In:

  4th International Congress on «Cocoa, Coffee, Tea», Torino, Italy, 25-28 June 2017.

• Suzuki, Tomonori; Smrke, Samo; Wellinger, Marco; Balsiger, Franz; Yeretzian, Chahan,

  2016.

  A novel gravimetric approach to measure the degassing of roasted coffee.

  In:

  26th International Conference of the Association for the Science and Information on Coffee (ASIC 2016), Kunming, China, 13-19 November 2016.

• Smrke, Samo; Suzuki, Tomonori; Wellinger, Marco; Yeretzian, Chahan,

  2016.

  Degassing kinetics from whole roasted coffee beans and roast and ground coffee.

  In:

  26th International Conference of the Association for the Science and Information on Coffee (ASIC 2016), Kunming, China, 13-19 November 2016.

• Sanchez Lopez, Jose; Wellinger, Marco; Gloess, Alexia; Zimmermann, Ralf; Yeretzian, Chahan,

  2015.

  Extraction kinetics of coffee aroma compounds during espresso extraction on a professional : on-line analysis by PTR-ToF-MS.

  In:

  3rd International Congress on «Cocoa, Coffee, Tea», Aveiro, Portugal, 22-24 June 2015.

• Wellinger, Marco; Smrke, Samo; Balsiger, Franz; Yeretzian, Chahan,

  2015.

  Gravimetric analysis of degassing kinetics of freshly roasted and ground coffee.

  In:

  3rd International Congress on «Cocoa, Coffee, Tea», Aveiro, Portugal, 22-24 June 2015.

Publications before appointment at the ZHAW

Gasification of hay in a bench scale fluidised bed reactor with emphasis on the suitability for gas turbines
By: Judex, Johannes W.; Wellinger, Marco; Ludwig, Christian; et al.
BIOMASS & BIOENERGY Volume: 46 Special Issue: SI Pages: 739-749 Published: NOV 2012


Online elemental analysis of process gases with ICP-OES: A case study on waste wood combustion
By: Wellinger, Marco; Wochele, Joerg; Biollaz, Serge M. A.; et al.
WASTE MANAGEMENT Volume: 32 Issue: 10 Pages: 1843-1852 Published: OCT 2012

Sampling and Online Analysis of Alkalis in Thermal Process Gases with a Novel Surface Ionization Detector
By: Wellinger, Marco; Biollaz, Serge; Wochele, Joerg; et al.
ENERGY & FUELS Volume: 25 Issue: 9 Pages: 4163-4171 Published: SEP 2011

A versatile salt evaporation reactor system for SOFC operando studies on anode contamination and degradation with impedance spectroscopy
By: Nurk, Gunnar; Holtappels, Peter; Figi, Renato; et al.
JOURNAL OF POWER SOURCES Volume: 196 Issue: 6 Pages: 3134-3140 Published: MAR 15 2011

Changes of the soil ecosystem along a receding glacier: Testing the correlation between environmental factors and bacterial community structure
By: Noll, Matthias; Wellinger, Marco
SOIL BIOLOGY & BIOCHEMISTRY Volume: 40 Issue: 10 Pages: 2611-2619 Published: OCT 2008

Consuming algal products: trophic interactions of bacteria and a diatom species determined by RNA stable isotope probing
By: Sapp, Melanie; Gerdts, Gunnar; Wellinger, Marco; et al.
HELGOLAND MARINE RESEARCH Volume: 62 Issue: 3 Pages: 283-287 Published: SEP 2008

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