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US 4,546,253 AGranted
Apparatus for producing sample ions
AssigneeMasahiko Tsuchiya
InventorsMasahiko Tsuchiya, Hirofumi Kuwabara
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Abstract
Apparatus for producing sample ions comprising means of producing metastable species by corona discharges in the carrier gas, a needle-shaped emitter whose pointed end is inserted into the stream of carrier gas which transports said metastable species, means for applying a high potential to said needle emitter, wherein sample is arranged adjacent to or deposited on the pointed end of said emitter. Its value is further enhanced when it is combined with a mass spectrometer.
Claims8
An apparatus for producing sample ions from a specimen comprising:
- (a) means for supporting the specimen;
- (b) a needle-shaped emitter, the pointed end of which is arranged adjacent the specimen;
- (c) means for applying a high potential to the emitter;
- (d) means for producing a metastable but nonionized species by corona discharge in a carrier gas;
- and
- (e) means for directing the carrier gas with the metastable species to the specimen
- whereby the specimen, on contact with the metastable species, together with the emitter at high potential, produces a large quantity of sample ions.
4 more elements
Dependencies are inferred from the claim text.