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. Author manuscript; available in PMC: 2014 Apr 3.
Published in final edited form as: Anal Chim Acta. 2013 Feb 4;770:10.1016/j.aca.2013.01.047. doi: 10.1016/j.aca.2013.01.047

Fig. 1.

Fig. 1

(a) 3-D view of simulated model showing the initial location of the species plug. (b) Reduction in the available flow area due to geometrical transition with A1 being the original cross-section and A2 being the reduced flow area.