The ToF spectra of the 120 cycles
(1 s/cycle) for each in-vivo nosespace measurement were processed
similarly to the headspace spectra, except the 120 cycles
were not averaged but extracted individually in order to study
the breath curve of each m/z. Custom scripts were used to select
masses containing peak-like curves (Romano et al., 2013). Important
nosespace parameters extracted from selected m/z were: Area
under the Curve, AUC; maximum intensity, Imax; and time to
maximum intensity, Tmax were extracted. Other consumption
parameters measured: time of consumption, Tcon; time to first
swallow, Tswal and number of swallows, Nswal.