High performance liquid chromatography (HPLC) is a well-known, tried and trusted method for mixture separation, widely used for quality analysis and control, as well as laboratory sample preparation. Preparative HPLC systems (including semi preparative and narrow-bore) accomplish high flow rates of up to 100ml/min and at pressures of up to 50 bar/725psi, with high volumetric linearity. A preparative HPLC system typically employs a UV, RID and/or IR detector for highly accurate separation analysis. When looking to purchase a preparative HPLC system, one must pay note to models that provide interoperability with other lab equipment, real time computer analysis and control (or computer-independent control) and comprehensive database storage options.