A Comparison of Methods of Improving the Duty Cycle on Orthogonal TOF Mass Analyzers

Library Number:
720001203EN
Part Number:
720001203EN
Author(s):
Jason L Wildgoose, Steven D Pringle, Kevin Giles, Robert H Bateman, Steve Bajic,
Source:
ASMS 2005
Content Type:
Posters
Content Subtype:
ASMS
When a continuous ion source is coupled to an oa-ToF mass analyser the duty cycle, or sampling efficiency, is typically about 25% for the highest m/z ions. The duty cycle decreases for ions of lower m/z in proportion to the square root of their m/z values. An established method of increasing the duty cycle involves accumulating ions from a continuous ion source and then extracting them in a pulse. This can increase the duty cycle over a restricted mass range, but for ions outside that range the duty cycle will be reduced.

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