A dispensing device for use in chemical analysis comprising at least two dispenser nozzles, a chamber having at least two inlets, a membrane entity constituting part of defining elements of said chamber, said membrane entity comprising at least one flexible membrane, and an actuation element, such that liquids brought to flow through said inlets into said chamber can be pressurised by actuating the membrane entity by providing a pulse to said actuation element, and thereby dispensing an amount of liquid through each of said at least two nozzles. Embodiments include devices comprising integrated free flow electrophoresis separation means.
