Stable Isotope Lab

The Institute of Environmental Sciences’ Stable Isotope Lab provides state-of-the-art facilities to measure the delta proportions of 13C, 15N, 18O, and 2H in solid and liquid samples. As mass spectrometer we use the Delta V Advantage coupled with the ConFlo IV for connection with the peripherals. Element analyses are done with a Flash 2000 HT for combustion and pyrolysis. Besides the routine analysis of bulk samples, we are currently establishing methods for compound-specific δ13C and δ15N analyses, which will be available soon. Samples are separated on a Trace GC Ultra and combusted in the GC IsoLink before connection with the Delta MS.


The Stable Isotope Lab also offers stable isotope services to other research facilities and industry. If you are interested in getting your samples measured, please follow these steps:

  1. Carefully read the information sheet provided in the download section.
  2. Contact us via silab(at) to clarify details of the analyses.
  3. Complete the order form and sample list provided in the download section.
  4. Send us your samples.



Equipment available

  • Delta V Advantage
  • ConFlo IV
  • Flash HT elemental analyser with SmartEA Option, AS 3000 II auto sampler for liqiuds and MAS200R auto sampler for solids
  • GC IsoLink connceted to a Trace GC Ultra with TriPlus auto sampler



Contact persons

If you have any questions, please do not hesitate to contact us via silab(at) .


Literature for Basics (in German)

  • Brauns, M., Von Schiller, D. & Gergs, R. (2012) Stabile Isotopentechniken und ihre Bedeutung für die gewässerökologische Forschung. In: Handbuch Angewandte Limnologie. 30. Ergänzungslieferung. Methodische Grundlagen III-3.3. (Eds M. Hupfer & W. Calmano & H. Klapper & R.-D. Wilken), pp. 1-20. Wiley-VCH, Weinheim.

Selected research using the Stable Isotope Lab facilities

  • Gergs R., Koester M., Schulz R.S. & Schulz R. (2014) Potential alteration of cross-ecosystem resource subsidies by an invasive aquatic macroinvertebrate: implications for the terrestrial food web. Freshwater Biology, 59, 2645-2655.
  • Koester M. & Gergs R. (2014) No evidence for intraguild predation of Dikerogammarus villosus (Sowinsky, 1894) at an invasion front in the Untere Lorze, Switzerland. Aquatic Invasions, 9, 489–497.
  • Wieczorek M.V., Kötter D., Gergs R. & Schulz R. (2015) Using stable isotope analysis in stream mesocosms to study potential effects of environmental chemicals on aquatic-terrestrial subsidies. Environmental Science and Pollution Research International.