Fig. 1.

Normalised ion-current spectra and deconvolution of Example-1. The yellow bars in panels A–C show the basis spectra used in the deconvolution (CH₄, N₂ and Air; see Table 3). Panels D and E show the spectra of Gas-I and Gas-II as determined in the measurements (blue bars) and by deconvolution in terms of the basis spectra (yellow bars; see Table 2). Note the logarithmic scaling of the ion-current data.