... %, total hydrocarbon: 10-5-100% Natural chromatographic analysis Separation for many valves and columns, TCD ... connection valve, two 6-way valve, four Chromatographic column and one thermal conductivity detector.The flow ... flow out from DC200 and flow into chromatographic column PQ, and when components H2S, C3 and ... , O2, N2, CH4, CO flow into chromatographic column 13X, switch the valve V3 from OFF to ...