Method of operating ion trap detector in ms/ms mode

Details Method of operating ion trap detector in ms/ms mode Method of operating ion trap detector in ms/ms mode

H - Electricity

01

J

358/9

H01J 49/42 (2006.01)

Patent

CA 1242536

ABSTRACT OF THE DISCLOSURE A simple and economical method of mass analyzing a sample by means of a quadrupole ion trap mass spectro- meter in an MS/MS mode comprises the steps of forming ions within a trap structure, changing the RF and DC voltages in such a way that the ions with mass-to-charge ratios within a desired range will be and remain trapped within the trap structure, dissociating such ions into fragments by collisions and increasing the field inten- sity again so that the generated fragments will become unstable and exit the trap volume sequentially to be detected. A supplementary AC field may be applied additionally to provide various scan modes as well as dissociate the ions.

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