Glow discharge mass spectrometer

Details Glow discharge mass spectrometer Glow discharge mass spectrometer

H - Electricity

01

J

358/9

H01J 49/10 (2006.01) H01J 49/04 (2006.01)

Patent

CA 1273716

ABSTRACT GLOW DISCHARGE MASS SPECTROMETER There is provided a mass spectrometer adapted for the elemental analysis of a sample, especially a solid sample, comprising a glow discharge ion source which yields ions characteristic of the elements in the sample. The background spectrum produced by such a mass spectrometer is substantially reduced by cooling the ion source below 20°C, and preferably below -100°C, thereby increasing the sensitivity and the accuracy of the spectrometer. The cooling of the ion source is preferably accomplished by flowing liquid nitrogen through a heat exchanger disposed in good thermal contact with it.

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