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Our electrospray ionization-ion funnel-rf hexapole (ESI-IF-6P) source is designed to produce ions for threshold collision-induced dissociation (TCID) studies in a guided ion beam mass spectrometer. This ion source forms an initial distribution of Ca2+(H2O)x ions where x is 6–9. A new in-source fragmentation technique within the hexapole ion guide of the source is described, which is easy to implement...
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