Device and method for solvent supply with correction of piston movement

摘要

A device and a method for supplying a solvent is described. A supply flow path comprises a metering device (2,6) with a piston (4,7), the metering device being adapted for metering the solvent. The supply flow path further comprises a control unit (9) adapted for controlling the metering device's piston movement in accordance with solvent pressure, wherein a variation of the solvent pressure gives rise to a corresponding variation of a solvent volume contained in the supply flow path or a part thereof. The control unit is adapted for compensating for the variation of the solvent volume by a corresponding corrective movement of the piston.