Have you ever thought about how drugs are manufactured? They are often produced by microorganisms which secret them into their environment: a soup of media, the target drug and waste that must be eliminated. In the pharmaceutical industry, people use chromatography columns to purify the medication. This process is used for more than a century for the separation of compounds. One may think that everything should be already known for such a well-established process. Yet, acib researchers found out recently that already the connecting tubes and valves affect the quality of the separation process and – in the end – product quality.