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(a) Protonated bromoisoquinoline ions in the absence of any monopolar DC or resonance ejection isolation. (b) Post-ion isolation in the absence of a DC potential using a 5 Vp-p ejection amplitude. (c) Post-ion isolation performed in the presence of +35 VDC and a 3.5 VP-P ejection amplitude. (d) Ion isolation in the absence of any DC using a 3.5 VP-P ejection amplitude.
