Title:
MASS SPECTROMETRY AND ION TRAP MASS SPECTROMETER
Document Type and Number:
WIPO Patent Application WO/2003/041116
Kind Code:
A1
Abstract:
Mass spectrometry for discriminating monovalent and multivalent ions easily using an ion trap mass stectrometer having a mass spectrometric analysis section provided with a ring electrode and a pair of end cap electrodes and performing mass spectrometry by temporarily trapping ions by a three−dimensional quadrupole field. The mass spectrometry comprises a first step for generating a three−dimensional quadrupole field by applying a main high frequency voltage to the ring electrode, a second step for generating ions in the mass spectrometric analysis section or implanting ions externally and trapping ions having a mass&sol charge ratio within a specified range in the mass spectrometric analysis section, a third step for applying an auxiliary AC voltage having a plurality of components between the end gap electrodes and scanning the frequency components thereof, and a fourth step for scanning the main high frequency voltage and discharging ions from mass spectrometric analysis section.
Inventors:
KATO YOSHIAKI (JP)
Application Number:
PCT/JP2001/009730
Publication Date:
May 15, 2003
Filing Date:
November 07, 2001
Export Citation:
Assignee:
HITACHI HIGH TECH CORP (JP)
KATO YOSHIAKI (JP)
KATO YOSHIAKI (JP)
International Classes:
B01D59/44; H01J49/00; H01J49/42; (IPC1-7): H01J49/42; G01N27/62
Foreign References:
| JP2001167729A | 2001-06-22 | |||
| JP2001210268A | 2001-08-03 | |||
| JP2001159622A | 2001-06-12 | |||
| JPH11120956A | 1999-04-30 | |||
| JPH08287866A | 1996-11-01 |
Other References:
See also references of EP 1463090A4
None
None
Attorney, Agent or Firm:
Sakuta, Yasuo c/o HITACHI LTD. (5-1, Marunouchi 1-chom, Chiyoda-ku Tokyo, JP)
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