2.5 Mass Spectrometry
45
2.5 Mass Spectrometry
45
Mass Ion
Compound type
78
C 6 H 6
+·
aromatics
C 5 H 4 N +
pyridines
C 3 H 7 Cl +·
chloro compounds (with 37 Cl isotope signal)
79
C 6 H 7
+
aromatics with H-containing substituents
C 5 H 5 N +·
pyridines, pyrroles
Br +
bromo compounds (with 81 Br isotope signal)
80
C 6 H 8
+·
cyclohexenes, polycyclic alicyclics
C 5 H 4 O +·
cyclopentenones
HBr +·
bromo compounds (with 81 Br isotope signal)
C 5 H 6 N +
pyrroles, pyridines
81
C 6 H 9
+
cyclohexanes, cyclohexenyls, dienes
C 5 H 5 O +
furans, pyrans
81 Br +
bromo compounds (with 79 Br isotope signal)
82
C 6 H 10
+·
cyclohexanes
C 5 H 6 O +·
cyclopentenones, dihydropyrans
C 5 H 8 N +
tetrahydropyridines
C 4 H 6 N 2
+·
pyrazoles, imidazoles
CCl 2
+·
chloro compounds (with isotope signals at m/z 84 and 86)
83
C 6 H 11
+
alkenes, alicyclics, monosubstituted alkanes
C 5 H 7 O +
cycloalkanones
84
C 5 H 10 N +
piperidines, N-methylpyrrolidines
85
C 6 H 13
+
alkanes
C 5 H 9 O +
alkanones, alkanals, tetrahydropyrans, fatty acid derivatives
CClF 2
+
chlorofluoroalkanes (with 37 Cl isotope signal)
86
C 5 H 10 O +·
alkanones, alkanals
C 5 H 12 N +
aliphatic amines
N indicator
87
C 5 H 11 O +
alcohols, ethers, esters
O indicator
C 4 H 7 O 2
+
esters, carboxylic acids
88
C 4 H 8 O 2
+·
ethyl esters of carboxylic acids, α‑methyl‑methyl esters,
α‑C 2 -carboxylic acids
89
C 4 H 9 O 2
+
diols, glycol ethers
2 × O indicator
C 4 H 9 S +
sulfides (with 34 S isotope signal)
90
C 7 H 6
+·
disubstituted aromatics
91
C 7 H 7
+
aromatics
C 4 H 8 Cl +
alkyl chlorides (with 37 Cl isotope signal)