N
X
C
O
N
S
Hal
Solvents
Natural
Products
P Si
C
C
C C
C
C
438
8 Mass Spectrometry
2-Nitrophenyl octyl ether (M r 251.3)
Triethanolamine (M r 149.2)
Sulfolane (M r 120.2) [2]
Hexadecylpyridinium bromide (M r 384.4; for [hexadecylpyridinium] + , m/z 304.3)
in 2-nitrobenzyl alcohol
100
50
0
300
250
200
150
100
50
0
5.0
2.5
0.0
1000
950
900
850
800
750
700
650
600
550
500
10
500
450
400
350
300
29
71
57
94
120
252
333 364
503
221 235
140
43
486
471
735
100
50
0
250
200
150
100
50
0
1.0
0.5
0.0
1000
950
900
850
800
750
700
650
600
550
500
4
500
400
300
45
74
132
118
267
150
307
448
597
194
30 56
281
100
50
0
500
450
400
350
300
250
200
150
100
50
0
10
5
0
1000
950
900
850
800
750
700
650
600
550
500
27
87
121
105
241
151
166
481
41 55
225
286
601
50
25
0
250
200
150
100
50
0
10
5
0
1000
950
900
850
800
750
700
650
600
550
500
80
500
400
300
29
69
120
80
148
93
304
608
204
176
43
55
690