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. Author manuscript; available in PMC: 2017 Feb 13.
Published in final edited form as: Anal Chem. 2016 Aug 12;88(18):8949–8956. doi: 10.1021/acs.analchem.6b01914

Figure 4.

Figure 4

Arrival time distribution of the doubly charged peptide ions of bradykinin (RPPGFSPFR), GPFRPRFPS, and RRGPFPSPF analyzed by (A) multiturn TW-SLIM module (44 cm) at TW speed of 126 m/s (B) drift tube IM (89 cm) applying a static field of 17.3 V/cm. Arrival time distributions for singly charged tetrasaccharides analyzed by (C) multiturn TW-SLIM module (44 cm) at TW speed of 84 m/s (D) drift tube IM (89 cm) applying a static field of 17.3 V/cm. The TW-SLIM studies were performed at the following conditions: TW amplitude of 30 V using a symmetric square wave (11110000), a guard bias of 15 V, and an RF amplitude (Vp–p) of 300 V.