Mass spectrometry method and apparatus

Details Mass spectrometry method and apparatus Mass spectrometry method and apparatus

H - Electricity

01

J

H01J 49/42 (2006.01) H01J 3/40 (2006.01) H01J 49/10 (2006.01)

Patent

CA 2689084

A mass spectrometer comprises an ion source for supplying sample ions for analysis, an ion trap and a voltage source. The ion trap has an entrance for receiving sample ions and an exit through which the sample ions are released. The voltage source is configured to apply a first set of trapping voltages to the ion trap to confine the sample ions within the ion trap. The first set of trapping voltages are selected to cause a center of an ion cloud defined by the sample ion contained within the ion trap to be positioned closer to the exit than to the entrance. The voltage source is configured to apply a release voltage to the ion trap to release the sample ions from the ion trap through the exit.

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