We demonstrate that N2 largely affects the ionization process,
whereas H2 affects both the ionization process and in-plasma reactions.
Our investigations also suggest that dissociative electron capture is the main ionization route for formation of Br− ions.
Importantly, GC-PARCI-MS shows a uniform response factor for bromine across brominated compounds of drastically different
chemical structures, confirming PARCI’s ability to quantify organobromines in the absence of compound-specific standards.