| 摘要 |
An electron transfer dissociation (ETD) and/ or proton transfer reaction (PTR) device is provided comprising a ring stack ion guide 2 formed from a plurality of apertured electrodes 1. One or more transient DC voltage waves or waveforms, preferably two opposed DC voltage waves or waveforms 8 and 9, are applied to the electrodes 2. Reagent anions and/or analyte cations are arranged to be conveyed by the DC voltage waveforms into a reaction region 5 in which they interact with each other or undergo ion-neutral reactions with a neutral reaction gas. The resulting fragment ions which are formed within the reaction cell are then subsequently translated out of the reaction cell by means of one or more transient DC voltage waves 8 and 9. |
