Preparative liquid chromatography apparatus

摘要: The invention provides a preparative liquid chromatography apparatus wherein flow rate control can be effected in wider range and with higher degree of accuracy than where pump is used while preventing production air bubbles the mixture ratio chemicals controlled wide high accuracy. includes plurality buffer tanks enclosed pressurizing type, pressurization for supplying gas to apply pneumatic pressure insides tanks, electric signal converters adjusting pressures applied actually by response signals, detectors detecting rates forced out from gas, arithmetic units comparing detected preset values produce signals outputted converters.