Gas sample injection device for gas chromatographic analysis, and method thereof

A gas sample injection apparatus for gas chromatography analysis comprising:

• a plurality of gas collecting tubes for collecting gas inside a cell and regulating it with an open/close valve to discharge a portion of the collected gas as a gas sample;
• a gas sampling loop for collecting the gas sample injected into a gas chromatograph;
• a first switching valve connected to the gas sampling loop for regulating an injection of the gas sample filled in the gas sampling loop into a column of the chromatograph with a carrier gas;
• a second switching valve connected to the gas collecting tubes connected through the open/close valve and for regulating a diffusion of the gas sample into the gas sampling loop;
• and
• a vacuum pump for vacuum-depressurizing the gas sampling loop;
• wherein the plurality of gas collecting tubes are in the form of a multi-position valve (MPV) thereby enabling a plurality of gases to be discharged as gas samples;
• and the plurality of gas collecting tubes are connected to a plurality of gas collectors.