Chromatography Research International

Research Article

Evaluation of Comprehensive 2D Gas Chromatography-Time-of-Flight Mass Spectrometry for 209 Chlorinated Biphenyl Congeners in Two Chromatographic Runs

Table 4

Congeners and Some PCB Coeluting Isomers (1D Mode) with their Percent “Ortho Effects”.
IUPAC Numbers of Coeluting Isomers (“Ortho Effects”)
Tri28(5%) + 33(5%) + 21(6%)
Tri39(5%) + 38(7%)
Tetra64(4%) + 40(82%)*
Tetra65(7%) + 62(5%) + 47(26%)*
Tetra67(3%) + 58(4%)
Hexa163(4%) + 129(56%)*
Hepta182(32%) + 175(44%)
Octa201(4%) + 204(2%)
*This isomer can be distinguished from other coeluting isomers by the “ortho effect.” The penta isomers were given previously in the text and figures.