Research Article
Evaluation of Comprehensive 2D Gas Chromatography-Time-of-Flight Mass Spectrometry for 209 Chlorinated Biphenyl Congeners in Two Chromatographic Runs
Table 1
Polychlorinated biphenyl Congener classes with identification ions.
| | PCB Congener Classes | Numbers of PCB isomers per congener class | Molecular Formula | Identification ions M+∙ | (M-Cl)+ | (M-2Cl)+∙ |
| | Monochlorobiphenyl | 3 | C12H9Cl | 188 | 153 | — | | Dichlorobiphenyl | 12 | C12H8Cl2 | 222 | 187 | 152 | | Trichlorobiphenyl | 24 | C12H7Cl3 | 256 | 221 | 186 | | Tetrachlorobiphenyl | 42 | C12H6Cl4 | 290 (292)* | 255 | 220 | | Pentachlorobiphenyl | 46 | C12H5Cl5 | 324 (326) | 289 (291)* | 254 | | Hexachlorobiphenyl | 42 | C12H4Cl6 | 358 (360) | 323 (325) | 288 (290)* | | Heptachlorobiphenyl | 24 | C12H3Cl7 | 392 (394) | 357 (359) | 322 (324) | | Octachlorobiphenyl | 12 | C12H2Cl8 | 426 (430) | 391 (393) | 356 (358) | | Nonachlorobiphenyl | 3 | C12HCl9 | 460 (464) | 425 (429) | 390 (392) | | Decachlorobiphenyl | 1 | C12Cl10 | 494 (498) | 459 (463) | 424 (428) |
|
|
*Most abundant ion of the isotope cluster is in parentheses, if not first member.
|
