Quadrupole mass spectrometer with spatial dispersion

H - Electricity – 01 – J

Patent

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H01J 49/42 (2006.01)

Patent

CA 2494922

A mass analyzer for use in a mass spectrometry system comprises an elongate rod set. The rod set has first and second ends and an inscribed circle within the rod set. The radius of the rod set varies from one end of the rod set to the other, so that ions of different mass to charge ratios will become unstable at different locations along the rod set. This characteristic can then be used to cause ejection of ions at different locations along the rod set, in a mass dependent manner. Detectors placed linearly along the rod set can then be used to detect ions and determine the mass of the ions from their ejection locations.

L'invention concerne un dispositif d'analyse utilisé dans un système de spectrométrie de masse comprenant un ensemble de tiges allongées. Ledit ensemble de tiges comprend une première et une seconde extrémités et un cercle est inscrit dans ledit ensemble. Le rayon de cet ensemble de tiges varie d'une extrémité de l'ensemble à l'autre, de sorte que des ions de masse différente selon des rapports de charge deviennent instables au niveau d'emplacements différents situés le long de l'ensemble de tiges. On peut utiliser cette caractéristique pour éjecter les ions, au niveau de différents emplacements le long de l'ensemble de tiges, en fonction de leur masse. On peut ensuite utiliser des détecteurs alignés le long de l'ensemble de tiges pour détecter des ions et pour déterminer leur masse à partir des emplacements d'éjection.

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