Instant Notes: Analytical Chemistry

282 Section E – Spectrometric techniques

100

80

60

40

20

0

20

(^182857)
77
105
121
51
0 40 60 80 100 120
Relative abundance
m/z
C 6 H 5 CONH 2
RMM = 121
Fig. 13. Mass spectrum of benzamide.
100
80
60
40
20
0
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Relative abundance
m/z
49
M(84)
M+2
M+4
CH 2 Cl 2
RMM = 84
100
80
60
40
20
0
10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170
Relative abundance
CH 3 CH 2 CH 2 CH 2 CH 2 CH 2 Br
m/z
RMM = 165
43
(^85) 135 137
M(164)M+2
Fig. 15. Mass spectrum of 1-bromohexane.
Fig. 14. Mass spectrum of
dichloromethane. From Instrumental
Methods of Analysis, 2nd edn, by
H.H. Willard, L.L. Merritt, J.A. Dean
& F.A. Settle © 1988. Reprinted
with permission of Brooks/Cole an
imprint of the Wadsworth Group, a
division of Thomson Learning.