Radiant energy – Ionic separation or analysis – Methods
Reexamination Certificate
2003-08-27
2004-11-23
Wells, Nikita (Department: 2881)
Radiant energy
Ionic separation or analysis
Methods
C250S281000, C250S288000, C250S291000, C250S293000
Reexamination Certificate
active
06822223
ABSTRACT:
BACKGROUND
U.S. Pat. No. 3,937,955 (Comisarow), titled “Fourier transform ion cyclotron resonance spectroscopy method and apparatus”, allegedly cites that a “gas sample is introduced into an ion cyclotron resonance cell enclosed in a vacuum chamber, and ionized. A magnetic field constrains ions to circular orbits. After an optional delay adequate to allow ion-molecule reactions to occur, a pulsed broad-band oscillating electric field disposed at right angles to the magnetic field is applied to the ions. As the frequency of the applied electric field reaches the resonant frequency of various ions, those ions absorb energy from the field and accelerate on spiral paths to larger radius orbits. The excited motion is sensed and digitized in the time domain. The result of the digitization is Fourier transformed into the frequency domain for analysis. If desired, a sequential series of pulsed broad-band oscillating fields can be applied and the resulting change in motion sensed, digitized and accumulated in a sequential manner prior to Fourier transformation.” See Abstract.
U.S. Pat. No. 5,264,697 (Nakagawa), titled “Fourier transform mass spectrometer”, allegedly cites that the “present invention relates to a Fourier transform mass spectrometer suitable for analysis of a particular component of a sample gas made of known components, which is adapted so as to prevent the high-frequency electric field applied to the high vacuum cell from deviating due to a variation in the long cycle of the static magnetic field applied to the high vacuum cell, which is characterized in that the variation in the long cycle of the magnetic field applied is detected as a deviation in the ion cyclotron resonance frequency of the particular component and the high frequency for forming the high-frequency electric field is made variable in accordance with the variation in the ion cyclotron resonance frequency.” See Abstract.
U.S. Patent Application No. 20020190205 (Park), titled “Method and apparatus for fourier transform mass spectrometry (FTMS) in a linear multipole ion trap” allegedly cites a “means and method whereby ions from an ion source can be selected and transferred via a multipole analyzer system in such a way that ions are trapped and analyzed by inductive detection. Ions generated at an elevated pressure are transferred by a pump and capillary system into a multipole device. The multipole device is composed of one analyzing section with two trapping sections at both sides. When the proper voltages are applied, the trapping sections trap ions within the analyzing region. The ions are then detected by two sets of detection electrodes.” See Abstract.
SUMMARY
Certain exemplary embodiments provide a method for automatically optimizing an FTMS. The method can comprise a plurality of potential activities, some of which can be automatically, repeatedly, and/or nestedly performed, and some of which follow. A composite amplitude relating to an FTMS spectral output signal for each of a plurality of FTMS samples can be obtained, each of the samples having an substantially similar number of molecules. The FTMS variable can be changed repeatedly and the composite amplitude re-obtained until a value of an optimization parameter substantially converges, the optimization parameter being a function of the composite amplitude.
Certain exemplary embodiments provide a method for performing repeated quantitative analysis using an FTMS. The method can comprise a plurality of potential activities, some of which can be automatically, repeatedly, and/or nestedly performed, and some of which follow. From at least one predetermined sample source, a sample can be obtained and provided to an FTMS. At least one variable for the FTMS can be optimized. A plurality of outputs can be acquired from the FTMS. An identity of at least one predominant ionic component of the sample can be ascertained. A quantity of at least one predominant ionic component can be determined.
REFERENCES:
patent: 4945234 (1990-07-01), Goodman et al.
patent: 5248882 (1993-09-01), Liang
patent: 5264697 (1993-11-01), Nakagawa et al.
patent: 6369382 (2002-04-01), Ito et al.
patent: 6680203 (2004-01-01), Dasseux et al.
PCT International Search Report—PCT/US 03/26786 Date of Mailing—May 14, 2004.
“Automation of a Fourier Transform ion Cyclotron Resonance Mass Spectrometer for Acquisition, Analysis, and E-Mailing of High-Resolution Exact-Mass Electrospray Ionization Mass Spectral Data”; N. Huang, M. Siegel, G. Kruppa and F. Laukien; Jun. 21, 1999; 1999 American Society for Mass Spectrometry.
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