Instrument: Gas Chromatograph
Instrument separating gases, volatile substances, or substances dissolved in a volatile solvent by transporting an inert gas through a column packed with a sorbent to a detector for assay. (from SeaDataNet, BODC)
A Shimadzu Model GC-6A gas chromatograph (gc) with a thermal conductivity detector was used to determine concentrations of total carbon dioxide (TCO2).