Are the ammonium salts exchanged after PAGE or HPLC purification?
After an oligo is purified, it is run through a column to remove any residual chemistry from the purification method and then the oligo goes through quantitative and qualitative testing. There is not a standard salt exchange performed. If you are needing to have a Na Salt Exchange, you can select this to be performed as an additional service. You can also select IE HPLC (if applicable) since it does not use ammonium salts during its process.