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. Author manuscript; available in PMC: 2018 Feb 1.
Published in final edited form as: J Am Soc Mass Spectrom. 2016 Dec 2;28(2):323–331. doi: 10.1007/s13361-016-1525-7

Fig. 1.

Fig. 1

(a) IM-MS spectrum of androsterone, indicating sodiated species at m/z 313.214 for [M+Na]+, 603.439 for [2M+Na]+, and 893.664 for [3M+Na]+. Extracted drift spectra overlays for androsterone and trans-androsterone are shown for the (b) sodiated monomer range (m/z 313–316) and (c) sodiated dimer range (m/z 603–606)