Fast pushing time of flight mass spectrometer combined with restricted mass to charge ratio range delivery

摘要

Within a time of flight mass spectrometer a control system applies a first extraction pulse to an accelation electrode in order accelerate a first group of ions into the time of flight region at a first time T1, wherein ions having the lowest mass to charge in the first group of ions have a time of flight All min through the time of flight region and ions having the highest mass to charge ratio in the first group of ions have a time of flight 4,T1 max through the time of flight region. The control system applies a second extraction pulse to the acceleration electrode at a subsequent second time T2, wherein AT1 max AT1 min =< T2 T1 < AT1 max. The mass to charge ratios of ions transmitted to the acceleration region of a Time of Flight mass spectrometer can be restricted.