Patent ID: 8549893
Filing Date: 2013-10-08
Classification: G01N,H01J

Abstract:
1. A system for interfacing a gas chromatograph (GC) to a mass spectrometer, the GC comprising a GC column partially contained within an interior volume of a GC oven, the mass spectrometer comprising a housing enclosing an interior having an ion source, the system comprising: a conduit extending from the GC oven to the mass spectrometer and comprising a conduit interior volume that is contiguous with the interior volume of the GC oven and fluidically coupled thereto such that a portion of the GC column extends through the conduit interior volume to the ion source; a tubular duct having a first end within the GC oven interior volume and a second end within the conduit interior volume, a portion of a length of which is within the conduit interior volume; and, a blower or fan within the interior volume of the GC oven and operable to generate an air or gas flow circulation comprising a first circulation portion outside of and directed away from the GC oven interior volume and a second returning circulation portion outside of and directed towards the GC oven interior volume, wherein the conduit, the duct and the blower or fan are configured such that, in operation, one of the first and second circulation portions is within the duct and the other one of the circulation portions is within the conduit.