| February 10, 2026
Air samples collected from static chambers are analyzed by gas chromatography (GC) to determine concentrations of CO₂, CH₄, and N₂O at specific time intervals, from which gas fluxes can be calculated.
The DASIG model provides two computational modules, GC_PREP and KASOKU, which automate the preparation of air sample batches for GC analysis and the determination of gas concentration calibration curves for the gas analyzer.
DASIG data handling routines currently support the Shimadzu® gas analyzers models 2014 and 2030, which simultaneously measure CO₂, CH₄, and N₂O concentrations from a single sample injection.
DASIG processes data files generated by the instrument and verifies its sensors continue to operate optimally while processing a large number of gas samples. DASIG determines optimum gas concentration curves through its own chromatograph analysis algorithms.