High-capacity anion column, which is used to purify the eluent flow. Even chemicals of the highest quality level, e.g. "Ultrapur" or "puriss", can still contain minimal anion contaminations. These are reliably held back by the Metrosep A Trap 1 - 100/4.0. Should these anionic contaminants elute at a later time, there will be practically no further noticeable influence on the baseline, due to the enormous peak widening.
This column is primarily used with gradient applications.