Patent ID: 8297106

Claim:
A gas chromatography system configured to work selectively in a retaining mode and in an evaporation mode, comprising: a tube ( 2 ) comprising a retaining part ( 3 ), said tube ( 2 ) having at least one first inlet part ( 21 ) and one second inlet part ( 22 ) located such that said retaining part ( 3 ) is located between said first inlet part ( 21 ) and said second inlet part ( 22 ) such that a fluid sample passing from said first inlet part ( 21 ) to said second inlet part ( 22 ) traverses said retaining part ( 3 ); a first gas supply subsystem ( 6 ) connected to said first inlet part ( 21 ) to supply, in a controlled manner, a gas to said first inlet part, such that said gas enters the tube ( 2 ) through said first inlet part ( 21 ); a second gas supply subsystem ( 7 ) connected to said second inlet part ( 22 ) to supply, in a controlled manner, a gas to said second inlet part ( 22 ), such that said gas enters the tube ( 2 ) through said second inlet part ( 22 ); at least one sample introduction duct ( 101 ) connected to said first inlet part ( 21 ) to introduce the sample in the tube ( 2 ) through said first inlet part ( 21 ); an evacuation duct ( 9 ) connected to said second inlet part ( 22 ) to evacuate a part of the sample; a temperature control subsystem ( 200 ) configured to regulate the temperature of the retaining part ( 3 ); the system additionally comprising at least one gas chromatography column ( 300 ); wherein said gas chromatography column ( 300 ) is connected to said second inlet part ( 22 ) to receive a gas coming from the retaining part ( 3 ) of the tube ( 2 ), and wherein an end ( 9 a ) of the evacuation duct ( 9 ) penetrates into the tube ( 2 ) and is located at a first distance from the retaining part ( 3 ), and an end ( 300 a ) of the gas chromatography column ( 300 ) penetrates into the tube ( 2 ) and is located at a second distance from said retaining area ( 3 ), said second distance being greater than said first distance.