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. Author manuscript; available in PMC: 2013 Aug 1.
Published in final edited form as: Anal Bioanal Chem. 2012 Jan 12;403(2):355–365. doi: 10.1007/s00216-011-5679-7

Fig. 3.

Fig. 3

DESI-MS spectra acquired when a solution of 20 μM flunitrazepam in methanol/water (1:1 by volume) containing 0.5% formic acid and 20 mM NH4OAc flowed through the thin-layer electrochemical cell with an applied potential of (a) 0.0 V and (b) −1.5 V; DESI-MS spectra acquired when a solution of 20 μM clonazepam in methanol/water (1:1 by volume) containing 0.5% formic acid and 20 mM NH4OAc flowed through the thin-layer electrochemical cell with an applied potential of (c) 0.0 V and (d) −1.5 V