| abstract |
A multidimensional liquid chromatography separation system and separation method for protein separation. The multidimensional liquid chromatography separation system for protein separation comprises a mobile-phase storage tank (2), a first liquid transfer device (3, 1-2), a second liquid transfer device (9, 1-1), a first sample introduction device (4-1, 4-2), a second sample introduction device (12), a separation device (7), a collection and storage device (10), at least two drainage devices (7-1, 7-2, 7-3) and a flow path switching device (11). When the liquid chromatography separation of each dimension is conducted, the collection and storage device collects target middle distillates needing to conduct the next step of liquid chromatography separation and stores same in a collection and storage device. During the liquid chromatography separation of the second dimension or more dimensions, all the target middle distillates from the collection and storage device are mixed with mobile phases through a sample introduction mixer of the second sample introduction device, and the amount of the mobile phases conveyed by same is adjusted and measured using the first liquid transfer device and the second liquid transfer device, so as to enable the eluent concentration in the sample introduction mixture to be lower than the critical migration eluent concentration of all the target proteins in the target middle distillates which need to be preserved in the separation of this dimension. |