| 摘要 |
<p>A method for separating ions is disclosed. A first analyzer region is provided defined by a space between first and second spaced apart electrodes. A second analyser region is defined in operational communication with the first analyzer region and having two electrodes. Ions are provided to one of the first analyzer region and the second analyzer region and then coupled from there to the other analyzer region. A first asymmetric waveform and a first direct-current compensation voltage are applied to electrodes for providing an electric field within the first analyzer region. The first asymmetric waveform is typically selected for effecting a difference in net displacement between two different ions in the time of one cycle of the applied first asymmetric waveform and the first compensation voltage is selected to support selective transmission of a first subset of the ions within the first analyzer region. Conditions are provided within the second analyzer region for effecting a second separation of ions therein to support selective transmission of a second subset of the ions within the second analyzer region.</p> |
