Trennvorrichtung fuer Gemische von gas- oder dampffoermigen Stoffen,insbesondere zur Abtrennung des Traegergases bei der Gaschromatographie

摘要

This invention relates to a device for separating mixtures of gasses or vapors. The device utilizes a separating chamber having an inlet for admitting the mixture by viscous flow. The chamber has two outlets, one of which permits molecular flow and the other of which permits viscous flow. Separation occurs when the lower molecular weight fraction of the mixture predominantly leaves the chamber through the outlet permitting molecular flow while the higher molecular weight fraction leaves through the viscous flow outlet. The device may be employed, for example, to separate the helium carrier gas from a hydrocarbon where the mixture is eluted from a gas chromatograph and it is desired to concentrate the hydrocarbon for analysis by mass spectrometry.