Radiant energy – Ion generation – Field ionization type
Patent
1977-08-05
1979-05-29
Dixon, Harold A.
Radiant energy
Ion generation
Field ionization type
250288, 313351, G01M 2124
Patent
active
041568141
ABSTRACT:
An apparatus for ionizing and vaporizing non-volatile or thermally labile molecules of a sample for introduction into a mass spectrometer analyzer which comprises a housing containing an ionization chamber; an ion exit port for the introduction of gaseous ions from said ionization chamber into a mass spectrometer analyzer on the portion of the housing attached to said mass spectrometer analyzer; inlet means for introducing a gaseous reactant into said ionization chamber within said housing; inlet means for admitting high energy radiation into said ionization chamber within said housing to at least partially ionize the molecules of said gaseous reactant; aperture means open into said ionization chamber of said housing for admitting a conductive emitter characterized by having a conductive element of a highly irregular surface upon which is deposited said sample for analysis into said mass spectrometer analyzer; and a vacuum exit aperture in said housing by which the pressure within said ionization chamber can be reduced.
REFERENCES:
patent: 3852595 (1974-12-01), Aberth
patent: 4023398 (1977-05-01), French et al.
Hunt Donald F.
Shabanowitz Jeffrey
Dixon Harold A.
University of Virginia
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