Patent ID: 8549894

Claim:
A gas chromatography apparatus, comprising: an analytical column; a sample gas introduction device communicating with the analytical column; a gas pressure controller comprising a carrier gas inlet, a carrier gas outlet communicating with the sample gas introduction device and a gas pressure reference outlet; a gas detector comprising a sample gas inlet communicating with the analytical column and a sample gas outlet; a gas buffer vessel communicating with the gas pressure reference outlet and the sample gas outlet, the gas buffer vessel comprising a gas buffer outlet; and a gas outlet valve configured for switching the gas buffer outlet between an open condition in a period during which an acquisition of chromatographic data is not desired, in which open condition the pressure controller, the detector and the gas buffer vessel are in fluid communication with an ambient environment surrounding the gas chromatography apparatus, and a closed condition during a run of a chromatography experiment, in which closed condition the pressure controller, the detector and the gas buffer vessel are fluidly isolated from the ambient environment.