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.
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| Company | KNAUER Wissenschaftliche Geräte GmbH | KNAUER Wissenschaftliche Geräte GmbH | KNAUER Wissenschaftliche Geräte GmbH |
| Item | AZURA Compact Prep HPLC System | AZURA Prep HPLC Lab System | AZURA Prep HPLC Pilot System |
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| Detector(s) | Variable single wavelength UV/Vis detection | UV/VIS (VWD, MWD, DAD), RID, FLD, ELSD | UVD (VWD, MWD, DAD), RID, FLD, ELSD |
| Flow Rate | 0.01–50 mL/min | Up to 50 mL/min | up to 1000 mL/min |
| Max. Pressure | 150 bar | Up to 200 bar (20 MPa) | 400 bar |
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