The HP/Agilent 1100 HPLC System provides efficient mixing and pulse free solvent delivery for consistently rapid and accurate results. Various combinations of modules including pumps and detectors are possible to address certain applications and requirements. It features a high-speed proportioning valve and pre-configured degasser, which allows low-pressure mixing and a large solvent choice flexibility. The Agilent 1100 Diode Array Detector (DAD) verifies its separation quality with multiple signals, peak purity, and spectral libraries during analytical quantification. The unit can be operated by a running computer or a hand-held controller. The quaternary pump provides high flexibility in solvent mixing for a wide range of research and routine applications and flow range.