HIGH PRESSURE CAPILLARY LIQUID CHROMATOGRAPHY SOLVENT DELIVERY SYSTEM

摘要

High pressure capillary liquid chromatography solvent delivery is effected at substantially low volume and atmospheric pressure. The low volume solvent composition is subsequently pressurized and expelled at high pressure into a receiving device such as a column. The solvent composition is expelled from a fluid metering system (40) configured to deliver liquids at low pressures to a storage matrix (20) via an isolation valve (28). The solvent composition is delivered to the storage matrix (20) in reverse order such that the first volume of liquid delivered into the storage matrix (20) is the last volume of liquid expelled out. Liquid pre-existing within the storage matrix (20) is transferred into a fluid accumulator (24) in fluid communication with the storage matrix (20). The fluid accumulator (24) is enveloped in a pressure caisson (14) which can be pressurized or depressurized in response to sensor signals.