I have similar problem, I have DMF mixed with TriEthylAmine and a new amoxicilline derivative, and I want a way to extract the pure (I call that derivative Nimoxicillin) Nimoxicillin from that mixture without destroying Nimoxicillin, I were trying to separate them by column ,but triethylamine try to have a spreading appearance on TLC (big tailing ). And I have a limited choices in my college to do such a research, I use the available technique in the lab. I don't have HPLC or GLC or other high developed technique, just Column (Silica Gel) and TLC , I were trying to solve this problem but the results are bad.
I hope some guidance from you.
By the way I'm undergraduate Pharmacist student, I'm fond of chemistry research.
Your kind assistance will be highly appreciated.