Patent ID: 8198090

Claim:
A cartridge comprising a plurality of tanks, each of which has an upper opening, a liquid being introduced into or led out from at least one of the plurality of tanks with a pipette, wherein the cartridge further comprises a waste liquid tank, a plurality of spaces are formed in at least one of a bottom and side walls of the waste liquid tank, each of the spaces allowing a capillary phenomenon to be generated, each of the spaces is configured so that when a residual liquid present at a leading end of a pipette is brought into contact with one of the spaces, the residual liquid is removed from the pipette and transferred to the one of the spaces through the capillary phenomenon, each of the spaces is a groove, and each of the grooves has a width in a range of 0.1 to 1 mm and a depth in a range of 0.3 to 1 mm.