Laboratories

The laboratory for light stable isotopes of the hydrogeology group is specialized in measurements of the liquid phase. It is equipped for measurements of stable isotope ratios of dissolved inorganic carbon (DIC), dissolved organic carbon (DOC) and particulate organic carbon (POC), and oxygen and hydrogen of water. A modified Gasbench system allows for the measurement of the oxygen isotope ratio of the dissolved oxygen (O₂, DO) in water. Additionally, carbon and oxygen isotope analysis of organic material and compound specific isotope analysis (CSIA) of organic pollutants can be carried out.

Routine analyses in major ions and trace elements as well as field sampling are also performed.

• δ²H and δ¹⁸O water (Picarro, Gasbench, and TC/EA liquid injection)
• δ¹³C-DIC and δ¹³C-DOC (Gasbench and Aurora 1030W)
• δ¹⁵N and δ¹³C-organic (bulk; Costech Elemental Analyzer)
• δ¹⁸O-solids (TC/EA with zero blank autosampler)
• gaseous CO₂ Proben (Dual Inlet and Gasbench)
• δ¹⁸O on dissolved oxygen (O₂, DO) (via modified Gasbench)
• δ¹³C and δ¹⁸O of CO2 (DeltaRay Laser Spectrometer)
• major ion analyses
• trace elment analyse
• field parameters (pH, eH, O2, alkalinity, temp., conductivity

Picarro L1102-i water isotope analyzer

Delta plus XP coupled to Thermo GC-C III and Gasbench II

ICP-MS iCAPQ

Delta V plus coupled to Costech Elemental Analyzer, Thermo TC/EA, and OI Analytical 1030W Aurora