Process columns

Process columns are packed cylindrical housings through which a liquid feed is pumped to separate its components by their differing affinity for a stationary phase, the core hardware of preparative and process-scale liquid chromatography. They range from small glass laboratory columns to large stainless steel vessels built for continuous bioprocessing lines. On Questpair, 80 percent of the listings are used, and the catalogue carries new, used and refurbished units from 16 verified suppliers and distributors across 9 countries. Prices run from EUR 5 to EUR 236.745. These systems sit at the heart of protein purification, buffer exchange and polishing steps, where column volume, packing integrity and pressure rating decide what a given separation can achieve.