[Warneke1996] "Proton transfer reaction mass spectrometry (PTR-MS): propanol in human breath",
International journal of mass spectrometry and ion processes
, vol. 154, no. 1: Elsevier, pp. 61–70, 1996.
Proton transfer reaction mass spectrometry (PTR-MS) based on reactions of H3O+ ions has been used to measure the concentrations of propanol in 46 healthy persons, yielding an average concentration of about 150 ppb. That the measurements were not obscured by other components of the same mass as propanol was proven by comparison of PTR-MS data with separate selected-ion flow-drift tube (SIFDT) investigations of the energy dependences of reactions of H3O+ and H3O+·H2O with isopropanol, n-propanol, acetic acid and methyl formate.