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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 1.

Figure 1

Separation of a 70 compound mixture with various transport gas conditions. A. Nitrogen transport gas. B. Nitrogen with 1.5% 2-propanol. C. Nitrogen gas with 44% helium. The mixture contained 70 compounds generating singly charged positive ions. MRM transitions are monitored for each compound with a dwell time of 10 ms, total cycle time of 2.1 s. The separation field was 132 Td, and under these conditions the number of compounds observed was 69, 58, and 57 out of a total of 70 compounds for the data presented in 1A, 1B, and 1C, respectively. The presence of 44% helium in the transport gas eliminated all compounds with m/z below 195 for the data presented in 1C. The approximate peak capacities are 13, 45, and 11, respectively.