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. 2021 Dec 21;9:813359. doi: 10.3389/fchem.2021.813359

FIGURE 3.

FIGURE 3

(A) Normal procedure for MS2 scan in ion trap mass spectrometer (a) and procedure of repeated ion accumulation by ion trap mass spectrometer (b). Adapted with permission from Si, X. Y., Xiong, X. C., Zhang, S. C., Fang, X. and Zhang, X. R. (2017). Anal. Chem. 89, 2,275–2,281 (Si, et al., 2017). Copyright 2017 American Chemical Society; (B) The dual TIMS and Q-TOF tandem mass spectrometer. Adapted with permission from Meier, F., Brunner, A.-D., Koch, S., Koch, H., Lubeck, M., Krause, M., et al. (2018). Mol. Cell. Proteomics 17, 2,534–2,545 (Meier et al., 2018). Copyright 2018 Elsevier.