Modifying PTR-MS operating conditions for quantitative headspace analysis of hydro-alcoholic beverages. 1. Variation of the mean collision energy to control ionization processes occurring during PTR-MS analyses of 10-40% (v/v) ethanol-water solutions

- Abundances of species from ethanol and of H3O+ ions could be controlled.
- E/N ratio must be adjusted to the ethanol content to obtain a correct ionization.
- Ethanol fragmentation patterns were reported for E/N values from 91 to 512 Td.
- In vitro results showed good perspectives for future in vivo applications.