Dr. Sebastian Opitz
Position at the ZHAW
@ Coffee Excellence Center:
Expertise in green coffee - from coffee farming to coffee trade. Ongoing projects in the field of coffee quality, coffee processing, coffee trade and sustainability of coffee cultivation.
Teaching within the CAS (certificate of advanced studies) - The Science and Art of Coffee of coffee: from cultivation of coffee to export of green beans.
Research Associate in Analytical Chemistry of non-volatile compounds
Lecturer in Liquid Chromatography within the Master "Chemistry for the Life Science"
and for chromatography within the Bachelor program in Chemistry as well as supervision of bachelor students.
Supervision and maintenance of the LC-MS equipment of the group Analytical Technologies.
Professional development teaching
Expertise and research interests
Expertise in green coffee, all fields from coffee cultivation to export. SCA diploma green coffee professional. The current research focus is on linking green coffee to the quality of roasted coffee, e.g. how does coffee variety, terroir and coffee processing such as fermentation and drying affect the quality of roasted coffee.
Analysis of non-volatile compounds: high performance liquid chromatography coupled to mass spectrometry (HPLC-SingleQuad MS, HPLC-MSn, UPLC-Triple Quad MS, UHPLC-ToF-MS, UHPLC-QToF-MS, NanoLC-IM-ToF-MS). Other liquid chromatography techniques (ion chromatography, size exclusion chromatography).
Analysis of volatile compounds: gas chromatography (liquid injection, headspace, SPME, cryofocussing), PTR-ToF-MS.
Post column derivatisation: off-line and on-line analysis of antioxidant active compounds (flow injection analysis and post-column derivatisation)
Spectroscopy (near infrared, Raman spectroscopy), process analytical technologies.
PhD at the Department of Chemical Ecology, Universities of Würzburg and Bielefeld, Germany in 2011.
Title: Sequestration of plant secondary metabolites in the genus Athalia
Analytics of plant secondary metabolites (glucosinolates, iridoids and clerodendrines) with HPLC-DAD, UHPLC-TOF-MS, HPLC-QTOF-MS and GC-MS.
Purification, isolation and identification of a glucosinolate metabolite with preparative chromatography, ion chromatography and NMR.
Master studies in chemistry and biology at the University of Bayreuth, Germany (degrees in 2005 and 2006)
Green coffee professional of the SCA. Participant of the Green Coffee Creator Group to further develop all the SCA curricula (green coffee foundation, intermediate and professional).
Research scientist since 2011:
Project manager of various projects with application of analytical chemistry mainly related to coffee using liquid chromatography coupled to mass spectrometry. Project manager of Horizon 2020 Project: ProPAT; Project manager of KTI project: Modulating the Coffee Roasting Process to Optimize the Antioxidant Potential of Coffee.
Membership of networks
- Improving rural livelihoods through promoting high-quality coffee and coffee cherry products in the origin countries Colombia and Bolivia / Team member / 01.10.2017
- planar-YES - neuartiges Testsystem auf estrogene Wirkung in Umwelt- und Lebensmittelproben / Team member / 01.06.2015
- Fermentation of tobacco leaves / Project leader / 01.05.2015
- ProPAT / Project leader / 01.01.2014
- Mepiquat as a process contaminant in roasted coffee / Project leader / 01.11.2013
- Modulating the Coffee Roasting Process to Optimize the Antioxidant Potential of Coffee / Project leader / 01.07.2012
Journal of agricultural and food chemistry.
Available from: https://doi.org/10.1021/acs.jafc.7b03310
Food and chemical toxicology.
Available from: https://doi.org/10.1016/j.fct.2017.12.051
Available from: https://doi.org/10.21256/zhaw-1957
Available from: https://doi.org/10.21256/zhaw-4220
Farah, Adriana, ed.,
Coffee : production, quality and chemistry.
Royal Society of Chemistry.
Available from: https://doi.org/10.1039/9781782622437-00726
Preedy, Victor R., ed.,
Processing and impact on antioxidants in beverage.
Available from: https://doi.org/10.1016/B978-0-12-404738-9.00026-X
Cocotea2019 Book Of Abstracts - Posters.
Fifth International Congress on Cocoa Coffee and Tea 2019 in Bremen, Germany from 26th to 28th June 2019..
Household and personal care today.
Swiss Chemical Society - 2012 Fall Meeting:ETH Zurich, Zurich, 13. September 2012.
Schweizerische Chemische Gesellschaft.
WORLD of COFFEE 2017, Dublin, Irland, 20-23 June 2017.
4th International Congress on Cocoa, Coffee, Tea, Torino, Italy, 25-28 June 2017.
2nd Annual World Congress of Food Science & Technology, Hangzhou, September 23-25, 2013.
Fall Meeting of the Swiss Chemical Society, ETH Zurich, Zurich, September 13, 2012.
Kuhlmann F, Opitz SEW, Inselbacher E, Ganeteg U, Näsholm T, Ninkovic V (2013) Exploring the Nitrogen Ingestion of Aphids — a New Method Using Electrical Penetration Graph and 15N Labelling, PLoS ONE. in press.
Opitz SEW, Boeve JC, Nagy ZT, Sonet G, Koch F, Müller C (2012) Host Shifts from Lamiales to Brassicaceae in the Sawfly Genus Athalia. PLoS ONE. 7:e333649, doi:10.1371/journal.pone.0033649
Opitz SEW, Mix A, Winde I, Müller C (2011) Desulfation followed by sulfation - Metabolism of Benzylglucosinolate in Athalia rosae (Hymenoptera: Tenthredinidae),
ChemBioChem. 12: 1252-1257. doi:10.1002/cbic.201100053.
Jensen SR, Opitz SEW, Gotfredsen CH (2011) A new phenylethanoid triglycoside in Veronica beccabunca L., Biochem. Syst. Ecol. 39: 193-197. doi:10.1016/j.bse.2011.02.008.
Opitz SEW, Jensen SR, Müller C (2010) Sequestration of glucosinolates and iridoid glucosides in sawfly species of the genus Athalia and their role in defense against ants, J. Chem. Ecol. 36: 148-157.
Opitz SEW, Müller C (2009) Plant chemistry and insect sequestration, Chemoecology 19: 117-154.