16 Organic compounds in soils, sediments & sludges
Figure 2.1 TIC of Ev/PY GC-MS analysis of the polluted soil sample. The upper trace represents
a part of the TIC magnified eight times. The number in the mass chromatograms represent the m/z values indicative of the following classes of compounds: m/z 104, 118,
132 (C 0 –C 2 styrenes); m/z 128, 142, 156, 170 (C 0 –C 2 napthalenes); m/z 134, 148,
162 (C 0 –C 2 benzo[b]thiophenes), m/z 154 (biphenyl and acenaphthane); m/z 168, 182,
196 (C 1 C 2 Biphenyls and C 0 –C 2 dibenzofurans); m/z 166, 180 (C 0 –C 1 fluorenes and
9-fluorenone); m/z 184 (dibenzothiophene); m/z 202 (fluoranthene and pyrene); m/a
228 (benzo[c]phenanthrene, benz(a)anthracene, chrysene, and triphenylene); m/z 252
(benzo[e]pyrene and benzo[a][yrene). The x axes of the mass chromatograms correspond
exactly with the appropriate parts of the TIC x axis directly above then (e.g. the major peak
in the mass chromatogram of m/z 168 corresponds with peak 41 in the total ion current
trace.
Reprinted from Che Leeuw et al, Anaylitcal Chemistry 1986, 58, 1852, ©1986 American
Chemical Society [32].
These workers observed that during Curie Point flash pyrolysis compounds which
are reasonably volatile at elevated temperatures do not fragment on a pyrolyser wire
but simply evaporate from it. Thus it appeared possible for them that the organic
matter present in soils can be characterised and identified very rapidly without any
sample pre-treatment by direct evaporation/pyrolysis of whole samples.
Figure 2.1 shows the total ion current trace and a number of appropriate mass
chromatograms obtained from the pyrolysis gas chromatography-mass spectrometry
Figure 2.1 TIC of Ev/PY GC-MS analysis of the polluted soil sample. The upper trace represents
a part of the TIC magnified eight times. The number in the mass chromatograms represent the m/z values indicative of the following classes of compounds: m/z 104, 118,
132 (C 0 –C 2 styrenes); m/z 128, 142, 156, 170 (C 0 –C 2 napthalenes); m/z 134, 148,
162 (C 0 –C 2 benzo[b]thiophenes), m/z 154 (biphenyl and acenaphthane); m/z 168, 182,
196 (C 1 C 2 Biphenyls and C 0 –C 2 dibenzofurans); m/z 166, 180 (C 0 –C 1 fluorenes and
9-fluorenone); m/z 184 (dibenzothiophene); m/z 202 (fluoranthene and pyrene); m/a
228 (benzo[c]phenanthrene, benz(a)anthracene, chrysene, and triphenylene); m/z 252
(benzo[e]pyrene and benzo[a][yrene). The x axes of the mass chromatograms correspond
exactly with the appropriate parts of the TIC x axis directly above then (e.g. the major peak
in the mass chromatogram of m/z 168 corresponds with peak 41 in the total ion current
trace.
Reprinted from Che Leeuw et al, Anaylitcal Chemistry 1986, 58, 1852, ©1986 American
Chemical Society [32].
These workers observed that during Curie Point flash pyrolysis compounds which
are reasonably volatile at elevated temperatures do not fragment on a pyrolyser wire
but simply evaporate from it. Thus it appeared possible for them that the organic
matter present in soils can be characterised and identified very rapidly without any
sample pre-treatment by direct evaporation/pyrolysis of whole samples.
Figure 2.1 shows the total ion current trace and a number of appropriate mass
chromatograms obtained from the pyrolysis gas chromatography-mass spectrometry