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. Author manuscript; available in PMC: 2013 Jul 8.
Published in final edited form as: Anal Chem. 2010 Mar 1;82(5):1867–1880. doi: 10.1021/ac902571u

Figure 4.

Figure 4

Comparison of the separation of 3 selected ions from the 70 compound mixture, demonstrating the differences in peak position and peak FWHM observed when operating with (A) nitrogen transport gas, FWMH ~ 1.87 V, (B) nitrogen with 44% helium transport gas, FWMH ~ 1.47 V, and (C) nitrogen with 1.5% 2-Propanol, FWMH ~ 2.13 V. The ions are 1) dianabol, 2) benoxinate, and 3) clenbuterol, and the separation fields was 132 Td. FWHM is smallest in the He mixture because of the higher mobility in He, and greater in 1.5% 2-propanol because of the reduced mobility of clusters.