Patent ID: 8496890

Claim:
A pretreatment apparatus for chemical analysis, comprising a plurality of containers which are arranged in a row, each of such plurality of containers being capable of containing one of a specimen liquid and a reagent, flow paths connecting the containers in series, a dialysis flow path including a dialysis membrane facing to the flow path, a syringe pump, first valves connected to respective ones of the containers and configured to release the respective containers to the atmosphere, and second valves operably connected to the syringe pump and respective ones of the containers and configured to supply a pressure from the syringe pump to the respective containers, wherein the containers have respective cross sections decreasing downward, an end of the flow path is connected to a bottom of a first one of the containers while another end of the flow path is connected to a container wall surface of a subsequent second one of the containers at a position higher than a liquid level in the second one of the containers with a downward direction, and the flow path has a volume sufficient for receiving therein temporarily at least a part of the liquid to be contained in each of the containers.