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. 2019 Dec 27;8(1):A0078. doi: 10.5702/massspectrometry.A0078

Fig. 5. Mass spectrum of a complex steroid mixture (A) with TWIMS-MS arrival time distributions at the indicated m/z values for the estriol and testosterone isomers as lithiated monomers at m/z 295 (B); aldosterone and cortisone as potassiated monomers at m/z 399 (C); potassiated estradiol dimers and lithiated testosterone isomer dimers at m/z 583 (D); androsterone and epiandrosterone as lithiated dimers at m/z 587 (E); and 11-deoxycortisol and corticosterone as lithiated dimers at m/z 699 (F). Reprinted from A. L. Rister, T. L. Martin, and E. D. Dodds, Formation of multimeric steroid metal adducts and implications for isomer mixture separation by traveling wave ion mobility spectrometry, J. Mass Spectrom. (2019) 54, 5, 429–436 with permission..

Fig. 5. Mass spectrum of a complex steroid mixture (A) with TWIMS-MS arrival time distributions at the indicated m/z values for the estriol and testosterone isomers as lithiated monomers at m/z 295 (B); aldosterone and cortisone as potassiated monomers at m/z 399 (C); potassiated estradiol dimers and lithiated testosterone isomer dimers at m/z 583 (D); androsterone and epiandrosterone as lithiated dimers at m/z 587 (E); and 11-deoxycortisol and corticosterone as lithiated dimers at m/z 699 (F). Reprinted from A. L. Rister, T. L. Martin, and E. D. Dodds, Formation of multimeric steroid metal adducts and implications for isomer mixture separation by traveling wave ion mobility spectrometry, J. Mass Spectrom. (2019) 54, 5, 429–436 with permission..