2.5 Mass Spectrometry
33
Elements
Mass Relative
abundance
Elements
Mass Relative
abundance
Elements
Mass Relative
abundance
Cl 1 Si 1
63
100
Cl 2 Si 1
98
100
Cl 3 Si 1 133
100
64
5.08
99
5.08
134
5.08
65
35.31
100
67.27
135
99.23
66
1.62
101
3.25
136
4.87
67
1.07
102
12.35
137
33.85
103
0.52
138
1.56
104
0.34
139
4.29
2.5.6 Isotope Patterns of Combinations of Cl and Br
The signals are separated by 2 mass units. The mass for the most abundant
signal is shown under the symbol of the element. The combination of the
lightest isotopes is given on the left side of the x axis. See Chapter 2.5.5 for
exact abundances of many of these combinations.
Signals
separated
by 2 units
Br
79
Br 2
160
Br 3
239
Br 4
320
Br 5
399
Cl
35
ClBr
116
ClBr 2
195
ClBr 3
276
ClBr 4
355
ClBr 5
436
Cl 2
70
Cl 2 Br
151
Cl 2 Br 2
230
Cl 2 Br 3
311
Cl 2 Br 4
390
Cl 2 Br 5
471
Cl 3
105
Cl 3 Br
186
Cl 3 Br 2
267
Cl 3 Br 3
346
Cl 3 Br 4
427
Cl 4
142
Cl 4 Br
221
Cl 4 Br 2
302
Cl 4 Br 3
381
Cl 4 Br 4
462
Cl 5
177
Cl 5 Br
256
Cl 5 Br 2
337
Cl 5 Br 3
418
Cl 6
212
Cl 9
319
Cl 12
426
Br 6
480
Br 9
718