Table 4. PTR-ToF-MS-8000 measurement parameters for our study.

Transfer line		Ion source		PTR drift tube				ToF-MS
Inlet Flow	Temp.	Inlet Flow	Current	E/N Ratio	Temp.	Pressure	Voltage	Mass resolution
20 sccm	75 °C	6–7 sccm	4–5 mA	137–139 Td	75 °C	2.3 mbar	610 V	4000–5000 FWHM

Optimised operating values for transfer line, ion source, PTR drift tube and time of flight-mass spectrometry (ToF-MS) are presented.