US Patent 7374674 Liquid chromatography apparatus

A liquid chromatography apparatus includes a separation column, liquid feed pump which feeds eluent into the separation column, a detector which detects elution component fed from the separation column, and a plurality of valves which control a flow of liquid which passes from the liquid feed pump to the detector via the separation column, wherein the liquid feed pump, the separation column, the detector, and the plurality of valves are disposed in a cooled portion within a first unit, and among the mechanical parts and the electrical parts that respectively form the liquid feed pump, the detector, and the plurality of valves, the electrical parts are disposed in a non-cooled portion within the first unit.