Laboratory

Analysis of groundwater samples

Filterphotometer photoLabS12 (wtw)

• environmental (on-site) parameters (pH, redox, electrical conductivity, oxygen)
• acid-/base neutralization capacity (titrator T50, Mettler Toledo)
• phosphate, iron(II), nitrate and others: photometer photoLabS12 (wtw), wavelengths: 340, 410, 445, 500, 525, 550, 565, 605, 620, 665, 690, 820 nm

Determintaion of geohydraulic parameters

• particle size distribution: sieve-/sedimentation (DIN 18123)
• hydraulic conductivity (DIN 19683-9): test cylinder 10 cm / 50 cm, triaxial cell up to 50 cm lenght as well as a Ksat instrument (meter)
• solid density: pycnometry methods (DIN ISO 11508), ultra pycnometer 1000 (Quantochrome)
• porosity und effective porosity: flow experiments using tracers
• TIC- & TOC (loss of ignition)-contents, ph-value (DIN ISO 10693, 19684-3 ISO 10390)
• suction pressure - saturation connections (soil pF curves): pressure pots with pressure plate measurements from 0,1 to 15 bar corresponding to pF 1.8 to pF 4.2 (Soil Moisture)

 Determintaion of physiosorption parameters

• measurement of specific surfaces area  (BET) according to DIN ISO 9277 as well as micro pore volume and micro surface area of porous samples (Autosorb-1C, Quantochrome)

Stable Isotope laboratory

Isotope Ratio Mass Spectrometer IRMS MAT 253 system (Thermo Fisher Scientific) for

• carbon and nitrogen isotope bulk analysis in solid samples  via coupling the
  IRMS to an elemental analyzer EA 3000 (Eurovector)
• compount specific isotope analysis (CSIA): carbon isotopes of BTEX and LHKW in water samples via coupling the IRMS to a gas chromatograph GC7890 (Agilent)
• oxygen and hydrogen isotope analysis of water samples via coupling the IRMS to a high temperature pyrolysis oven HT (HEKATech)

Isotope Ratio Mass Spectrometer IRMS Delta V Plus (Thermo Fisher Sci.) for:

• carbon, nitrogen, sulfur and oxygen isotope analyis of solid samples as well as dissolved sulphate via coupling the IRMS with an EA IsoLink (Thermo Fisher Sci.)
• nitrogen and oxygen isotope analysis of dissolved nitrate and ammonium via
  coupling the IRMS to a gas chromatograph Gas Bench II (Thermo Fisher Sci.)
• carbon as well as nitrogen and oxygen isotope analysis of methane and nitrogen dioxide trace gases after preconcentration via PRECON (Thermo Fisher Sci.) and subsequent IRMS analysis

Stable Isotope Analysis mentioned above can be offered for research cooperations and as offer analysis by our
Core Facility Environmental Analytics.