Radiant energy – Ionic separation or analysis – Methods
Reexamination Certificate
2008-02-22
2011-11-29
Kim, Robert (Department: 2881)
Radiant energy
Ionic separation or analysis
Methods
C250S281000, C250S288000, C702S023000
Reexamination Certificate
active
08067728
ABSTRACT:
Selectivity of a measurement from a mass spectrometer is improved by selecting an extracted ion current window for the measurement after data acquisition. A plurality of mass spectra are acquired over a period of time. A first extracted ion current window is selected and from the plurality of mass spectra a first intensity as a function of time is calculated for an ion using the first extracted ion current window. A second extracted ion current window is selected and from the plurality of mass spectra a second intensity as a function of time is calculated for the ion using the second extracted ion current window. A first signal-to-noise ratio of the first intensity is compared with a second signal-to-noise ratio of the second intensity. If the second signal-to-noise ratio is greater than the first signal-to-noise ratio, the second intensity as a function of time is used for the measurement.
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Le Blanc Yves
Thomson Bruce A.
DH Technologies Development Pte. Ltd.
Kasha John R.
Kasha Law LLC
Kim Robert
Logie Michael J
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