... V1 into quantitative tube 1, after sweeping clean, switch V1 from OFF to ON, carrier gas 1 takes ... into analytical column DC200, before components flowing out, switch valve 1 from OFF to ON, C6+ was ... N2, CH4, CO flow into chromatographic column 13X, switch the valve V3 from OFF to ON. Components CO2 ... and C2 will be detected by TCD in sequence. Switch the valve V3 from ON to OFF, components ...