Radiant energy – Ionic separation or analysis – With evacuation or sealing means
Patent
1998-01-29
1999-12-14
Anderson, Bruce C.
Radiant energy
Ionic separation or analysis
With evacuation or sealing means
250289, B01D 5444, H01J 4900
Patent
active
060021306
ABSTRACT:
Ions generated under an atmospheric pressure pass through vacuum chambers partitioned through first, second and third fine holes. The ions are led to an MS part where the ions are mass-analyzed. A first vacuum chamber adjacent to an atmospheric pressure part has not vacuum pump for independently pumping this chamber. The first vacuum chamber is evacuated by a common pump together with a second vacuum chamber via a bypass hole formed in the wall having the second aperture. A pressure of the first vacuum chamber can be set to several 100 Pa, while a pressure of the second vacuum chamber can be set to several 10 Pa. Sufficient desolvation has been attained by an ion acceleration voltage of approximately 100 V in the first vacuum chamber, while a speed spread can be restrained. The ions are accelerated by approximately 10 V in the second vacuum chamber, and the speed can be restrained as low as possible.
REFERENCES:
patent: 3842266 (1974-10-01), Thomas
patent: 4209696 (1980-06-01), Fite
patent: 4740696 (1988-04-01), Osawa et al.
patent: 4769540 (1988-09-01), Mitsui et al.
patent: 4769640 (1988-09-01), Mitsui et al.
patent: 4842701 (1989-06-01), Smith et al.
patent: 4963735 (1990-10-01), Okamot et al.
patent: 4996424 (1991-02-01), Mimura et al.
patent: 5015845 (1991-05-01), Allen et al.
patent: 5157260 (1992-10-01), Mylchreest
Analytical Chemistry, vol. 62, No. 13, Jul. 1, 1990, pp. 713A-725A, American Chemical Society; E.C. Huang et al, "Atmospheric Pressure Ionization Mass Spectrometry", p. 713A; figs. 1-2.
Journal of Chromatographic Science, vol. 29, Aug. 1991, pp. 357-366.
Mass Spectrometry Reviews, 1991, 10, pp. 53-77.
Anderson Bruce C.
Hitachi , Ltd.
LandOfFree
Mass spectrometry and mass spectrometer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mass spectrometry and mass spectrometer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mass spectrometry and mass spectrometer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-865759