Abstract:
Described is a mobile phase solvent delivery module for liquid chromatography and supercritical fluid chromatography systems. The module includes a pump disposed in a fluid path that conducts a mobile phase solvent. The pump provides the mobile phase solvent at an increased pressure. The module also includes a purification cartridge disposed in the fluid path either before or after the pump. The purification cartridge has an inlet to receive the mobile phase solvent and an outlet to provide a purified mobile phase solvent, and includes a packing material for removing an impurity from the mobile phase solvent. In various embodiments, the module also includes one or more additional components to allow various techniques for regeneration or replacement of spent purification cartridges. For example, the module may also include one or more of a temperature control module, a fluidic switch and one or more additional purification cartridges.
Abstract:
A supercritical fluid chromatography system is provided with an injection valve subsystem for introducing a sample into a flow of mobile phase fluid. The injection valve subsystem includes an auxiliary valve and an inject valve. The operations of the auxiliary and inject valves are coordinated in such a manner as to reduce sample carry-over and system pressure perturbations occurring during sample injection.
Abstract:
A method includes passing a mobile phase fluid flow comprising liquefied CO2 through a separation column; then introducing a makeup fluid flow into the mobile phase fluid flow to form a mixed fluid flow; and then splitting the mixed fluid flow.
Abstract:
A supercritical fluid chromatography system is provided with an injection valve subsystem for introducing a sample into a flow of mobile phase fluid. The injection valve subsystem includes an auxiliary valve and an inject valve. The operations of the auxiliary and inject valves are coordinated in such a manner as to reduce sample carry-over and system pressure perturbations occurring during sample injection.