Patent ID: 7695617

Claim:
An interface injector device for the direct coupling of liquid chromatography and gas chromatography, which can work in an adsorption mode and in a desorption mode, comprising an outer body ( 1 ) with a first end part ( 1 a ), a second end part ( 1 b ), an intermediate section ( 1 c ) between said end parts ( 1 a , 1 b ), and an inner cavity in which there is a first inner chamber ( 2 a ) and a second inner chamber ( 2 b ); at least one first passage ( 3 ) from the first chamber ( 2 a ) to a waste duct ( 8 ), and at least one second passage ( 4 ) from the second chamber ( 2 b ) to the outside of the injector body; an inner tube ( 5 ) arranged in said inner cavity; a dividing element ( 9 , 11 a ) surrounding the inner tube ( 5 ) and separating said first inner chamber ( 2 a ) from said second inner chamber ( 2 b ); the inner tube ( 5 ) having a first section ( 5 a ) arranged in the first inner chamber ( 2 a ), a second section ( 5 b ) arranged in the second inner chamber ( 2 b ), the first section ( 5 a ) ending in a first end ( 5 c ) with a first opening ( 5 d ) and the second section ( 5 b ) ending in a second end ( 5 e ) with a second opening ( 5 g ); an inner channel ( 5 f ) extending between said first and said second opening ( 5 d , 5 g ), said channel ( 5 f ) being able to house at least one adsorbent material ( 6 ), and at least one inorganic wool material ( 7 ) arranged in the first section ( 5 a ) of the inner tube; characterized in that the first end ( 5 c ) of the inner tube ( 5 ) has retaining means ( 10 a , 10 b ) for retaining the inorganic wool material ( 7 ), the first opening ( 5 d ) of the inner tube ( 5 ) communicates with the first passage ( 3 ) to the waste duct ( 8 ) exclusively though the first inner chamber ( 2 a ).