| 摘要 |
<p>A mass spectrometer is disclosed comprising an on trap and a fragmentation device. Ions are fragmented in the on trap to form first generation fragment ions. The ion trap has a relatively high mass cut-off. The first generation fragment ions are then transferred to a fragmentation device which is arranged to have a substantially lower low mass cut-off. The first generation fragment ions are fragmented within the fragmentation device any may optionally be stored in an ion accumulation region prior to being passed to a mass analyser for subsequent mass analysis.</p> |
