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.
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.
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
Outside air measurements were taken from the roof of the CIO Univ. Groningen in January 2011 (13CO2 component displayed)
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.
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)
Measurements were taken in the Lab of Delta Analytics