Table 3.
Elution order of (+)- and (−)-atropisomers of PCBs on different enantioselective gas chromatography columns. Atropisomers shown in bold indicate an inversion in elution order of the atropisomers compared to the CD column.
| Compound | 20B | BDM | BGB | BPM | CB | CD |
|---|---|---|---|---|---|---|
| PCB 84 | nr | nr | (−)/(+)3 | nr | (+)/(−) | (−)/(+)1 |
| PCB 132 | (−)/(+) | nr | (−)/(+)3 | (−)/(+) | nr | (−)/(+)1 |
| PCB 136 | (−)/(+) | unknown | nr | nr | (−)/(+)4 | (−)/(+)1 |
| PCB 149 | (−)/(+) | (−)/(+) | (−)/(+) | (−)/(+) | (−)/(+) | (−)/(+)2 |
| PCB 174 | nr | (−)/(+) | (+)/(−)3,? | nr | (−)/(+) | (+)/(−)1 |
| PCB 176 | nr | (−)/(+) | nr | nr | (−)/(+) | (−)/(+)1 |
| PCB183 | nr | nr | (−)/(+)5 | nr | nr | nr |
1
Elution order of (+)- and (−)-PCB atropisomers according to Haglund and Wieberg [37].
2
Elution order of atropisomers of PCB 149 according to Harju and Haglund [3].
3
Elution order of atropisomers according to Konwick et al. [42]
4
Elution order of atropisomers of PCB 136 according to Wong et al. [43].
5
Elution order of atropisomers of PCB 183 according to Toda et al [46].
?
Previously reported elution of (+)-PCB 174 as first eluting atropisomer does not agree with findings in the current study.
nr = not resolved.