Mass spectrometer

Details Mass spectrometer Mass spectrometer

2006-07-18

2006-07-18

Lee, John R. (Department: 2881)

Radiant energy

Ionic separation or analysis

Cyclically varying ion selecting field means

C250S290000, C250S291000, C250S293000, C250S281000, C250S282000, C250S283000, C250S285000

Reexamination Certificate

active

07078685

ABSTRACT:
A mass spectrometer capable of analysis at high speed and high accuracy comprising a device for applying a high frequency signal not containing resonance frequencies for plural precursor ions but containing resonance frequencies of other ions, and having different amplitudes on every frequencies to an electrode constituting the mass spectrometer thereby controlling the selection for the plural precursor ions, and a device for applying a high frequency signal having amplitudes set individually on every resonance frequencies of the plural precursor ions and superimposed with the resonance frequencies for the plural precursor ions to the electrode constituting the mass spectrometer thereby controlling the dissociation of the plural precursor ions, and judging the presence or absence of the aimed chemical substance based on the mass spectra of the obtained by dissociating the plural fragment ions.

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