Mass spectra and appearance energies of cationic fragments for electron ionization of 2-butanol R. A. A. Amorim, A. C. Diniz, C. B. Oliveira, O. L. Oliveira Junior, D. B. Jones, F. Blanco, G. García, M. J. Brunger and M. C. A. Lopes Eur. Phys. J. D, 76 11 (2022) 207 Published online: 04 November 2022 DOI: 10.1140/epjd/s10053-022-00537-w