Sampler for feeding a sample into an analysis branch of a liquid chromatography unit, in particular a high-performance liquid chromatography unit

摘要

Sampler for a liquid chromatography system, in particular a high-performance liquid chromatography system, a) with at least one injection needle (1), which can be controlled by a motor, b) with at least one needle seat (6), into which the tip of the at least one injection needle (1) can be pressed in, c) with a unidirectional injection valve, at the input of which at least one sample branch (18) is connected, which is connected to the at least one needle seat (6), and at least one connection to which an analysis branch leading to at least one separation column (9) ( 17) and at least one solvent branch (19) is connected, d) the sample branch (18) being closed in a liquid-tight manner in one position of the valve (3) and e) the sample branch (18) being open in another position of the valve (3) , so that a sample from a sample branch (18) as a volume flow Ė into the one connected to the solvent branch (19) Analysis branch (17) can be fed within a predetermined time interval (Δt = t4 - t1).