Environmental Monitoring

from December 2014: DITA2 (successor model for DITA)

FTIR Technology for measuring the isotope ratio of CO2 and trace gases in environmental air.

Dita2
Precision:
  • δ-13C: 0,1 ‰*
  • CH4, N2O, CO im ppb range*
  • ... more Specs comming soon

DIA (Delta Isotope Analyser)

NDIR technology for measuring the isotope ratio of CO2 in environmental air.

Dia
Precision:
  • δ-13C: < 0,2 ‰*
  • CO2: < 0,025 ppm*
  • *With parallel measurement of a reference standard in the CO2 concentration range and δ-13C range of the gas to be measured

Time course of a sequence of measurements with 3 calibration cylinders and outside air

Groningen_dat1_13.01.11_3.13c_750x600
Outside air measurements were taken from the roof of the CIO Univ. Groningen in January 2011 (13CO2 component displayed)
Groningen_dat1_13.01.11_3.v3_delta13c_580x500
Allan deviation plot from the calibration cylinder with 309 ppm

DITA (Delta Isotope and Trace Gas Analyser)

FTIR-Technology for measuring the isotope ratio of CO2 and climate warming trace gases like CO, CH4 and N2O in environmental air.

Dita
Detection limit
  • CO2: 0.01 ppm (μmol/mol)*
  • CH4: 0.07 ppm (μmol/mol)*
  • N2O: 0.06 ppm (μmol/mol)*
  • CO: 0.6 ppm (μmol/mol)*
  • *mixing ratios for 60 sec measurement, resolution 2 cm-1, (single channel ref 60 sec)
Precision:
  • CO2: 1 ppm (μmol/mol) for 400 ppm in gas*
  • CH4: <0.01 ppm (μmol/mol) for 2 ppm in gas*
  • N2O: <0.01 ppm (μmol/mol) for 1 ppm in gas*
  • CO: <0.01 ppm (μmol/mol) for 2 ppm in gas*
  • δ-13C: 0.5 ‰**
  • *mixing ratios for 10 times 60 sec measurement, resolution 2 cm-1, (single channel ref 60 sec) in 1 σ standard deviation; **after SVD analysis

FTIR spectrum on synthetic air, resolution 2 cm-1, average 15 sec (15 scans)

Synthetic_gas
Measurements were taken in the Lab of Delta Analytics