Air measurement methods using gas chromatograph and gas chromatograph analysis system

An air measurement method of measuring air by injecting air into a gas chromatograph through an injection port of the gas chromatograph from one end of a syringe including a piston therein, the syringe being configured to perform sucking and discharging of a fluid by sliding the piston therein, the air measurement method comprising:

• a liquid suction step of retracting the piston to suck a liquid that does not interfere with detection of a predetermined component in air by the gas chromatograph from the one end of the syringe to fill the syringe with the liquid;
• an air suction step of retracting the piston to suck a predetermined amount of air from the one end of the syringe into the syringe after the liquid suction step;
• an injection step of advancing the piston to discharge the predetermined amount of air from the syringe into the gas chromatograph through the injection port to inject the predetermined amount of air into the gas chromatograph after the air suction step;
• and
• a recording step of acquiring a detection signal for the air injected into the gas chromatograph in the injection step and recording an acquired detection signal in association with the air injection amount into the gas chromatograph.