Chlorine
Bromine
Cl
Cl 2
Cl 3
Br
Br 2
Br 2
Cl 3 Br 2
relative abundance
m/z
70 72 74 76
2x 35 Cl
1x 35 Cl
1x 37 Cl
2x 37 Cl
35 Cl
35 Cl
35 Cl
37 Cl
37 Cl
37 Cl
relative abundance
m/z
33 35 37 39
35 Cl
37 Cl
35 Cl
37 Cl
300
250
200
m/z
254
Cl 3
m/z
324
Cl 5
50
100
150
94
Cl 2
Cl
Cl
Cl
Cl
rel. int.
rel. int.
129
Cl 3
166
Cl 4
- Cl 2
- Cl
- Cl
Cl
Cl
Cl
Cl
Cl
Fig. 5.11 Systematic isotope pattern of chlorine and bromine in mass spectrometry and their
appearance in exemplary mass spectra of pollutants (tetrachloroethene and pentachlorobiphenyl)
5.1 Identification
111