Patent ID: 8642947
Filing Date: 2014-02-04
Classification: G01N,H01J

Abstract:
1. A mass spectrometer comprising: an ion guide including a plurality of electrodes for separating ions temporally; and a DC voltage source arranged and adapted to apply one or more transient DC voltages or potentials or one or more transient DC voltage or potential waveforms to at least some of the plurality of electrodes wherein said one or more transient DC voltages or potentials or one or more transient DC voltage or potential waveforms are translated along an axial length of said ion guide at a first velocity in a first mode of operation and at a second velocity in a second mode of operation, wherein in the first mode of operation said ion guide is arranged and adapted to separate ions temporally according to their ion mobility and wherein in the second mode of operation said ion guide is arranged and adapted to separate ions temporally according to their mass to charge ratio.