Table 2.
Column chemistry | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Pinnacle bi-phenyl | Raptor bi-phenyl | Viva bi-phenyl | Phenomenex bi-phenyl | Phenomenex phenyl-hexyl | Pinnacle C18 | Raptor C18 | Viva C18 | Ultra C18 | ||
Elution order of isomers | 1,3-diCQA | TM ∗ M # C | TM ∗ M # C | TM ∗ M # C | TM ∗ M # C | TM ∗ M # C | TM ∗ M # C | TM ∗ M # C | TM ∗ M # C | TM ∗ M # C |
1,5-diCQA | TM ∗ CM # | TM ∗ CM # | TM ∗ CM # | TM ∗ M # | TM ∗ | CM ∗ T | M ∗ CTM # | M ∗ TM # | CM ∗ TM # | |
3,4-diCQA | M ∗ TM # C | M ∗ TM # C | M ∗ TM # C | TM ∗ C | M ∗ TM # | M ∗ TCM # | M ∗ TM # C | M ∗ TM # C | M ∗ TM # | |
3,5-diCQA | TCM ∗ M # | TCM ∗ M # | TCM ∗ M # | TM ∗ M # | T | CM ∗ M # T | CM ∗ T | CTM # | CM ∗ M # T | |
4,5-diCQA | M ∗ TCM # | M ∗ TCM # | M ∗ TCM # | TM ∗ CM # | M ∗ TM # | M ∗ CTM # | M ∗ TCM # | M ∗ TCM # | M ∗ CTM # |
T represents the di-trans-isomer; M ∗ represents the first eluting mono-cis-isomer; M # represents the second eluting mono-cis-isomer; C represents the di-cis-isomer.