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. Author manuscript; available in PMC: 2014 Feb 3.
Published in final edited form as: Chem Commun (Camb). 2012 Dec 20;49(10):947–965. doi: 10.1039/c2cc36577d

Fig. 1.

Fig. 1

Schematic diagram of a quadrupole ion trap mass analyzer equipped for ion/ion reactions via sequential axial injection (through the end-cap electrode). Reprinted from ref. 20 [original source “Figure 1: Schematic diagram (not to scale) of the Dueling ESI ion trap mass spectrometer”], Copyright 2002 Elsevier Science, Inc., with kind permission from Springer Science and Business Media.