Burns, Doane, Swecker & Mathis, L.L.P.
Ion attachment mass spectrometry apparatus, ionization apparatus, and ionization method
An ion attachment mass spectrometry apparatus provided with a first chamber and a second chamber separated by a partition having an aperture (nozzle), an emitter, a mass spectrometer, a vacuum pump, and a sample gas introduction mechanism for introducing a sample gas and making metal ions attach to sample gas molecules to make the sample gas positive ions. Further, the Knudsen number of the aperture is made not more than 0.01, the pressure of the second chamber is not more than {fraction (1/10)}th of the first chamber, gas of the sample gas in the first chamber is blown out from the aperture to the second chamber, and a supersonic jet formed in the second chamber is provided. Sample gas and metal ions are injected into the supersonic jet region and metal ions are made to attach to the sample gas molecules.
Anelva Corporation
H
H01J
inventional
Munetaka Toshihiro Masao Yoshiro Yoshiki
Nakata Fujii Takayanagi Shiokawa Hirano