Patent ID: 7194890
Filing Date: 2007-03-27
Classification: G01N

Abstract:
1. A gas chromatograph comprising: a gas separation column accommodating a member for causing a flow delay depending on gas component; an air pump for supplying an air as a carrier gas into said gas separation column; a gas supply port formed in a gas flow channel extending between said air pump and said gas separation column, and adapted to supply a subject gas containing a target gas component to be detected into the air flowing in said gas flow channel; a buffer tank provided upstream of said gas supply port, and having the capability of retaining a larger amount of the air than the amount of the air supplied per unit of time into said gas separation column by said air pump; and a detector for detecting the gas component of said subject gas supplied to said gas separation column, wherein said buffer tank has a suction port opened to outside, and a discharge port connected to said air pump so that the air sucked by said air pump through said buffer tank is sent to said gas separation column through said gas flow channel.