METHOD AND DEVICE FOR MASS-SPECTROMETER ANALYSES OF IONS IN QUADRUPLE MASS FILTER Russian patent published in 2003 - IPC

Abstract RU 2198449 C2

FIELD: mass- spectrometer analyses. SUBSTANCE: ions to be analyzed are separated according to mass-to-charge ratio during their flight in high-frequency field; during their flight ions at least twice pass through field areas differing in DC component value and/or high-frequency component, and/or frequency, and/or on/off time ratio, and/or supply voltage pulse shape, and/or geometry of field-forming electrode system so that effective point of analyzed ions on Hall equation solution stability diagram pass over one of coordinates from one stability-area boundary to other. Device implementing this method has set of parallel rods forming quadruple capacitor; novelty is that at least once distance between opposing plates of capacitor varies lengthwise in steps. EFFECT: enhanced resolving power and sensitivity of mass-spectrometer. 2 cl, 6 dwg

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RU 2 198 449 C2

Authors

Sheretov Eh.P.

Rozhkov O.V.

Gurov V.S.

Dubkov M.V.

Dates

2003-02-10—Published

1997-09-24—Filed