An ion guide or ion trap (1) is disclosed having an entrance electrode (2) and an exit electrode (3). The potential of the exit electrode (3) is periodically dropped for a relatively short period of time allowing some ions to escape from the ion guide or ion trap (1) via an aperture in the exit electrode (3). The period of time that the potential of the exit electrode (3) is dropped for is progressively increased and ions emerge from the ion guide or ion trap (1) in a mass to charge ratio dependent manner. The ion guide or ion trap (1) may be operated as a mass separator or low resolution mass analyser.
申请公布号
US8153960(B2)
申请公布日期
2012.04.10
申请号
US20060916438
申请日期
2006.06.05
申请人
GILES KEVIN;GREEN MARTIN;PRINGLE STEVEN DEREK;WILDGOOSE JASON LEE;MICROMASS UK LIMITED
发明人
GILES KEVIN;GREEN MARTIN;PRINGLE STEVEN DEREK;WILDGOOSE JASON LEE