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. Author manuscript; available in PMC: 2012 Jul 15.
Published in final edited form as: Anal Chem. 2011 Jun 21;83(14):5617–5623. doi: 10.1021/ac200719n

Fig. 5.

Fig. 5

Detection limits for 3+ ions using tac = 60 ms: (a) IMS spectra for 1, obtained in 30 s for the concentration of 0.5 nM (blue line, left scale) or 15 s for 20 nM (red line, right scale) and (in the inset) the MS spectrum for 0.5 nM, summed over t = 19 - 24 ms; (b) peak area for 1 in the IMS spectrum, depending on the concentration; (c) 2-D IMS/MS spectrum and its IMS and MS dimensions, obtained in 15 s for the mixture of 1, 2, and 3 with 2 nM concentration (or the consumed amount of 150 attomoles) for each.