Sampling system for mass spectrometer

Details Sampling system for mass spectrometer Sampling system for mass spectrometer

B - Operations, Transporting

01

D

358/9

B01D 59/44 (2006.01) H01J 49/04 (2006.01) H01J 49/26 (2006.01) G01N 30/72 (2006.01)

Patent

CA 1117225

ABSTRACT OF THE DISCLOSURE An apparatus for introducing a gaseous sample into a mass spectrometer is disclosed which includes a hollow antechamber or cavity disposed between the sample stream and the high vacuum enclosure. Orifice openings are provided in the antechamber which allow the antechamber to communicate both with the high vacuum enclosure and the sample stream. An electrically operated pulsed valve is used to admit a series of small volumes of sample by pulses of controlled duration and frequency such that the sample flow from the antechamber into the high vacuum enclosure can be made to resemble one of essentially constant flow. ?

334089

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