I’ve recently worked with several peptide groups that are trying out flash purification with their peptides for the first time. And it never fails, every single interaction includes the question “what flow rate should I use for these cartridges?”
There is a lot of information available highlighting optimal flow rates for HPLC method development, but very little information for larger particle stationary phases. I personally have used a wide range of flow rates for my peptide purification with differing outcomes. So in today’s post I’d like to have a more thorough discussion about mobile phase flow rate and it’s impact on your chromatography.