Prediction of gas chromatographic retention behavior with mixed liquid phases

1979 ◽  
Vol 51 (6) ◽  
pp. 594-598 ◽  
Author(s):  
Robert L. Pecsok ◽  
James. Apffel
Keyword(s):  
Chromatographic Retention ◽  
Retention Behavior ◽  
Liquid Phases

Capillary Gas-Chromatographic Retention Behavior and Physico-Chemical Properties of Underivatized Equine Estrogens

1995 ◽  
Vol 60 (5) ◽  
pp. 813-819 ◽  
Author(s):  
Jasmina Novakovic ◽  
Eva Tvrzická ◽  
Václav Všetečka ◽  
Vladimír Pouzar ◽  
Ladislav Feltl
Keyword(s):  
Dipole Moments ◽  
Chemical Properties ◽  
Retention Indices ◽  
Chromatographic Retention ◽  
Retention Behavior ◽  
Kováts Retention Indices ◽  
Physico Chemical ◽  
In Series ◽  
Mixed Stationary Phase ◽  
Equine Estrogens

The capillary gas-chromatographic retention behavior of six underivatized equine estrogens (estrone, equilin, equilenin and their corresponding 17α-diols) on a mixed stationary phase (non-polar CP-Sil 5 CB and slightly polar CP-Sil 19 CB capillary columns coupled in series) was characterized by their Kovats retention indices and steroid numbers. In order to find whether a correlation exists between the chromatographic retention and some physico-chemical properties of the compounds, their octanol-water partition coefficients and dipole moments were measured. No straightforward correlation was observed between the physico-chemical properties and the retention behavior, which suggests that the GC separation of equine estrogens is governed by some specific electron donor-electron acceptor interactions of a chemical nature.

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