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Laboratory of Isotope Biogeochemistry 2006-2022

The Laboratory of Isotope Biogeochemistry was a scientific technical facility of the Bayreuth Center of Ecology and Environmental Research (BayCEER) headed by Prof. Dr. Gerhard Gebauer. After the retierement of Prof. Gebauer at 30 September 2022 the equipment and technicians of the Laboratory of Isotope Biogeochemistry were organisational integrated into the Core Facility Bayreuth Center for Stable Isotope Research (BayCenSI) funded by the German Funding Agency (DFG) with Dr. Alexander Frank as Lab Manager. This web page will be updated with information on an ongoing research project by Prof. Gebauer and new publications of former projects.

 

Duties 2006-2022:

  • Abundance analysis of stable isotopes (δD, δ13C, δ15N, δ18O) for the BayCEER members
  • Development of advanced analytical techniques for the abundance analysis of stable isotopes together with the scientific units of BayCEER
  • Advice of the scientific units in experimental design and practical experimentation with stable isotopes at natural abundance level and as tracers
  • Own research projects using stable isotope abundance analysis
  • Teaching courses on stable isotope applications in biogeochemistry using the available equipment

Services 2006-2022:

  • Simultaneous determination of C and N isotope abundances13C, δ15N) in the natural abundance range and of C and N concentrations in organic and inorganic solid samples using an EA-IRMS coupling
  • Simultaneous determination of H/D and O isotope abundances (δD, δ18O) in the natural abundance range and of H and O concentrations in organic and inorganic solid and liquid samples using a TC-IRMS coupling
  • Substance specific determination of N, O and C isotope abundances15N, δ18O, δ13C) of atmospheric trace gases (specifically N2O and CH4) in the natural abundance range using a PreCon-GC-C-IRMS coupling
  • Simultaneous determination of C and N isotope abundances and of C and N concentrations in organic and inorganic solid samples from tracer experiments using an EA-IRMS coupling. The 13C or 15N enrichment of these samples must be below an upper threshold of 1000 %o. For this reason a consultation of Prof. Gebauer already during the planning phase of tracer experiments is urgently recommended.