Table 1. Relevant Mass Peaks Detected by PTR–ToF–MS During 1-Nitrosopiperazine (PZNO) Photolysis Experiments.

m/z	ion sum formula	interpretation
44.050	C2H6N+	fragment from [PZNO]H+, [PZNO2]H+ and [PZI]H+
83.060	C4H7N2+	H2 elimination from [PZI]H+
85.076	C4H9N2+	[PZI]H+, fragment from [PZNO]H+ and [PZNO2]H+
86.084	C4H10N2+	fragment from [PZNO]H+, [PZNO2]H+
116.082	C4H10N3O+	[PZNO]H+
132.077	C4H10N3O2+	[PZNO2]H+