Methods for fragmenting ions in a linear ion trap

Details Methods for fragmenting ions in a linear ion trap Methods for fragmenting ions in a linear ion trap

H - Electricity

01

J

H01J 49/10 (2006.01) H01J 49/26 (2006.01)

Patent

CA 2711707

Methods for fragmenting ions retained in an ion trap are described. In various embodiments, a non-steady-state pressure of a neutral collision gas of less than about 5 x 10-4 Torr and an excitation amplitude of less than about 500 mV (peak to ground) is used to fragment ions with greater than about 80% fragmentation efficiency. In various embodiments, duration of ion excitation is greater than about 25 ms.

L'invention concerne des procédés servant à fragmenter des ions retenus dans un piège à ions linéaire. Dans différents modes de réalisation, on utilise une pression non fixe de gaz de collision neutre inférieure à environ 5 x 10-4 Torr et une amplitude d'excitation inférieure à environ 500 mV (crête à sol) afin de fragmenter des ions selon une efficacité de fragmentation supérieure à environ 80%. Dans différents modes de réalisation, la durée de l'excitation des ions est supérieure à environ 25 ms.

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