Mass spectrometer

Details Mass spectrometer Mass spectrometer

2011-07-26

2011-07-26

Kim, Robert (Department: 2881)

Radiant energy

Ionic separation or analysis

With evacuation or sealing means

C250S281000, C250S282000, C250S290000, C250S293000

Reexamination Certificate

active

07985951

ABSTRACT:
A radio-frequency ion guide (20) for converging ions by a radio-frequency electric field and simultaneously transporting the ions into the subsequent stage is composed of eight rod electrodes (21through28) arranged in such a manner as to surround an ion optical axis (C). Each of the rod electrodes (21through28) is disposed at a tilt with respect to the ion optical axis (C) so that the radius r2of the inscribed circle (29b) at the end face of the ion exit side is larger than the radius r1of the inscribed circle (29a) at the end face of the ion injection side. Accordingly, the gradient of the magnitude or depth of the pseudopotential is formed in the ion's traveling direction in the space surrounded by the rod electrodes (21through28). Ions are accelerated in accordance with this gradient. Therefore, even in the case where the gas pressure is relatively high and ions have many chances to collide with gas, it is possible to moderate the ions' slowdown and prevent the ions' delay and stop.

REFERENCES:
patent: 2896083 (1959-07-01), Hare et al.
patent: 5847386 (1998-12-01), Thomson et al.
patent: 6177668 (2001-01-01), Hager
patent: 6417511 (2002-07-01), Russ et al.
patent: 6462338 (2002-10-01), Inatsugu et al.
patent: 6730904 (2004-05-01), Wells
patent: 6812453 (2004-11-01), Bateman et al.
patent: 7391021 (2008-06-01), Stoermer et al.
patent: 7569811 (2009-08-01), Javahery et al.
patent: 2003/0001088 (2003-01-01), Bateman et al.
patent: 2005/0199802 (2005-09-01), Ueno
patent: 2005/0253064 (2005-11-01), Loboda et al.
patent: 2005/0258354 (2005-11-01), Baba et al.
patent: 2006/0076485 (2006-04-01), Stoermer et al.
patent: 2007/0114392 (2007-05-01), Mukaibatake
patent: 2009/0218484 (2009-09-01), Javahery et al.
patent: 199 41 670 (2000-03-01), None
patent: 1465234 (2004-10-01), None
patent: 17630062 (2007-03-01), None
patent: 2341270 (2000-03-01), None
patent: 07-201304 (1995-08-01), None
patent: 11-510946 (1999-09-01), None
patent: 2000-149865 (2000-05-01), None
patent: 2005-259481 (2005-09-01), None
patent: 2006-525643 (2006-11-01), None
patent: 2006-332003 (2006-12-01), None
patent: 2007-128694 (2007-05-01), None
patent: 2007128694 (2007-05-01), None
patent: 97/07530 (1997-02-01), None
patent: 2004/100209 (2004-11-01), None
Andrew N. Krutchinsky, et al., “A novel high-capacity ion trap-quadrupole tandem mass spectrometer” International Journal of Mass Spectrometry, 2007, pp. 93-105, vol. 268.
Section 7.1.2 Chemical Ionization Ion Sources, in Jurgen H. Gross: “Mass Spectrometry A Textbook”, 2004, Springer Verlag, Berlin etc., XP00262799.
Japanese Office Action dated Apr. 5, 2011, for the corresponding Japanese Patent Application No. 2008-549302.
Extended European Search Report dated Mar. 18, 2011, for the corresponding European Patent Application No. 07849868.0.

Affiliated with

Also associated with

Rating

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 spectrometer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mass spectrometer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2676091