Automatic gas chromatography determination system for dissolved-state greenhouse gas

The invention discloses an automatic gas chromatography determination system for dissolved-state greenhouse gas. The automatic gas chromatography determination system comprises a headspace bottle filled with a sample to be detected, a three-way electromagnetic valve, a peristaltic pump, a quantitative loop for controlling gas inflow, a six-way two-position switching valve, a stainless steel packed column with PorapakQ filler and a gas chromatograph provided with a hydrogen flame ionization detector, one end of the sample inlet needle is inserted into a rubber plug of a headspace bottle of a sample to be detected and is positioned above water in the headspace bottle, a long needle is arranged in the headspace bottle, one end of the long needle is in contact with the bottom in the headspace bottle, and the other end of the long needle extends out of the headspace bottle and is connected with one end of a peristaltic pump; the other end of the peristaltic pump is communicated with a bottle filled with water thro