Ion attachment mass spectrometry apparatus

Details Ion attachment mass spectrometry apparatus Ion attachment mass spectrometry apparatus

2007-04-10

2007-04-10

Wells, Nikita (Department: 2881)

Radiant energy

Ionic separation or analysis

With sample supply means

C250S281000, C250S283000, C250S42300F, C313S359100

Reexamination Certificate

active

11277198

ABSTRACT:
An ion attachment mass spectrometry apparatus causing positively charged metal ions to attach to molecules of a gas to be measured in an attachment region to generate attached ions and then performing mass spectrometry on the attached ions by a mass spectrometer, has a metal ion selective disassociation unit for selectively making the metal ions attached to the specific molecules in the attachment region disassociate. By making the metal ions attached to the specific molecules such as H2O disassociate, a state is formed where the metal ions are attached to only the sample gas to be measured and the reliability of measurement of the gas is improved.

REFERENCES:
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V. Hodges et al., “Application of Alkali Ions in Chemical Ionization Mass Spectrometry”, Analytical Chemistry, vol. 48, No. 6, May 1976, pp. 825-829 (discussed in the specification).
Daniel Bombick et al., “Potassium Ion Chemical Ionization and Other Uses of an Alkali Thermionic Emitter in Mass Spectrometry”, Analytical Chemistry 1984, vol. 56, pp. 396-402 (discussed in the specification).
Toshihiro Fujii et al., “Chemical Ionization Mass Spectrometry with Lithium Ion Attachment to the Molecule”, Analytical Chemistry 1989, vol. 61, pp. 1026-1029 (discussed in the specification).
Chemical Physics Letters, vol. 191 (1992), pp. 162-168 (discussed in the specification).

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