Title:
同位体組成および質量分析システムおよび方法
Document Type and Number:
Japanese Patent JP2007527521
Kind Code:
A
Abstract:
Mass intensity values, isotopic ratios and exact mass differences between isotopes may be obtained and analyzed to determine if there are one or more masses of interest. In one implementation, a method will look among the mass intensity values for peaks of interest. The mass intensity values, representative of isotopic signatures, will be compared to a criteria in order to determine which of the masses are of interest. Although the invention is not so limited, examples of such criteria include mass intensity values above a specified threshold, within a certain ratio of another mass intensity value, and/or separation between the masses themselves. Optionally, a tolerance may be applied to the criteria. If masses are found to be of interest, MS/MS can automatically be triggered for one or all of the masses of interest, when an analyzing system such as an LC-MS-MS, GC-MS-MS or MALDI-MS-MS system is used.
Inventors:
Castro-Perez, Jose
Plum, Robert
The Johns, Christopher
Plum, Robert
The Johns, Christopher
Application Number:
JP2006518777A
Publication Date:
September 27, 2007
Filing Date:
July 02, 2004
Export Citation:
Assignee:
Waters Investments Limited
International Classes:
G01N27/62; G01N30/72; H01J49/04; G01N30/86
Domestic Patent References:
| JP2002184348A | 2002-06-28 |
Foreign References:
| WO2002025265A1 | 2002-03-28 |
Attorney, Agent or Firm:
Yoshio Kawaguchi
Makoto Ono
Kenkyo Kanayama
Katsuma Osaki
Mitsuaki Tsubokura
Makoto Ono
Kenkyo Kanayama
Katsuma Osaki
Mitsuaki Tsubokura