Switching system for a multidimensional gas chromatograph

Details Switching system for a multidimensional gas chromatograph Switching system for a multidimensional gas chromatograph

1991-03-26

1992-04-28

Spitzer, Robert

Gas separation

Means within gas stream for conducting concentrate to collector

55197, 55208, 55270, 55386, B01D 1508

Patent

active

051084686

ABSTRACT:
A switching device for a high resolution multidimensional gas chromatograph and a method of supplying a constituent from a component of a sample in a gas chromatograph effluent to a mass spectrometer. A series of open-split interfaces are interposed between a series of gas chromatographs having gas chromatographic columns with different liquid phases. An inert auxiliary fluid such as helium is supplied to the interfaces for carrying the effluent through the various stages of the device. A transfer member of the first interface is initially positioned to a first position to divert the inert fluid and the effluent to atmosphere until the desired component starts eluting from the first gas chromatograph. The transfer member of the first interface is then repositioned to a second position to direct the component and the inert fluid to the second gas chromatograph. A transfer member of the second interface is initially positioned to a first position to divert the inert fluid and the component to atmosphere until the desired constituent starts eluting from the second gas chromatograph. The transfer member of the second interface is then repositioned to a second position to direct the constituent into a mass spectrometer for a qualitative and a quantitative analysis.

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patent: 4861358 (1989-08-01), Mueller et al.
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