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)
• oxygen and hydrogen isotope analysis of water samples via coupling the IRMS to a high temperature pyrolysis oven HT (HEKATech)