Title:
QUADRUPOLE MASS SPECTROMETERS
Document Type and Number:
WIPO Patent Application WO2003065403
Kind Code:
A3
Abstract:
A quadrupole mass spectrometer (10) has at least two sets (14, 16) of electrodes in series, each set of electrodes being arranged to have a different r/ro ratio, wherein the r/ro ratio is that between the electrode radius (r) and the radius of the aperture between electrodes (ro).
Inventors:
TAYLOR STEPHEN (GB)
GIBSON JOHN RAYMOND (GB)
GIBSON JOHN RAYMOND (GB)
Application Number:
PCT/GB2003/000316
Publication Date:
September 25, 2003
Filing Date:
January 28, 2003
Export Citation:
Assignee:
UNIV LIVERPOOL (GB)
TAYLOR STEPHEN (GB)
GIBSON JOHN RAYMOND (GB)
TAYLOR STEPHEN (GB)
GIBSON JOHN RAYMOND (GB)
International Classes:
H01J49/00; H01J49/42; (IPC1-7): H01J49/42
Foreign References:
| US4234791A | 1980-11-18 | |||
| EP1109198A2 | 2001-06-20 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 2002, no. 03 3 April 2002 (2002-04-03)
REUBEN A J ET AL: "Ion trajectories in exactly determined quadrupole fields", INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES, ELSEVIER SCIENTIFIC PUBLISHING CO. AMSTERDAM, NL, vol. 154, no. 1, 31 May 1996 (1996-05-31), pages 43 - 59, XP004036512, ISSN: 0168-1176
DOUGLAS D J ET AL: "COLLISIONAL FOCUSING EFFECTS IN RADIO FREQUENCY QUADRUPOLES", JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY, ELSEVIER SCIENCE INC., NEW YORK, NY, US, vol. 3, 1992, pages 398 - 408, XP000667302, ISSN: 1044-0305
REUBEN A J ET AL: "Ion trajectories in exactly determined quadrupole fields", INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES, ELSEVIER SCIENTIFIC PUBLISHING CO. AMSTERDAM, NL, vol. 154, no. 1, 31 May 1996 (1996-05-31), pages 43 - 59, XP004036512, ISSN: 0168-1176
DOUGLAS D J ET AL: "COLLISIONAL FOCUSING EFFECTS IN RADIO FREQUENCY QUADRUPOLES", JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY, ELSEVIER SCIENCE INC., NEW YORK, NY, US, vol. 3, 1992, pages 398 - 408, XP000667302, ISSN: 1044-0305
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