Hi , Which column for GC works for phases G26 and G37? (in a single column)
As you can see, this phase is no longer available. If you compare McReynolds constants OV-225 (packed) and CP-Sil 43 CB (capillary) are the closest alternatives. Both are 50% Cyanopropylmethylpolysiloxane.
This is still available as packed GC phase, but nothing comes close in capillary GC.