150 Organic compounds in soils, sediments & sludges
100%
75%
50%
25%
2.0
1.5
1.0
0.5
0.0
0%
39
40
41
42
43
3108
3229
3349
3469
3590 Scans
minutes
RIC all 08-23-05-gn1-gp4-C.SMS
200
210
220
230
240
250
260
KCounts
m/z
204 207
215
221
230 233
241 245
249 252
258
Figure 6.5 Example mass spectrum (top) and chromatogram (bottom) for a trichlorobiphenyl (m/z
258) and the formation of a dichlorobiphenyl daughter (m/z 221), creating a false positive
error of 15%.
Reprinted from R.A. Ruddy et al, International Journal of Environmental Analytical Chemistry,
2008, 88, 337, © 2008,Taylor and Francis [131].
6.3.4 Chlorinated dioxins
Gas chromatography
Bertoni et al [136] used electron capture gas chromatography to determine 2,3,7,8tetrachlorodibenzo-p-dioxin in Sevesco soil at the pbb level with a 15% standard
deviation.