| abstract |
A concentrating device (100A) for concentrating a solution containing biological substances, wherein the concentrating device (100A) has: a first chamber (5a) for injecting a solution; a second chamber (5b) for filling a drawing agent ( 6); and a membrane (3) that separates the space (1) of the first chamber (5a) and the space (2) of the second chamber (5b), the membrane (3) having a first region (3a) and a second Region (3b), the first region (3a) has a semipermeability that shows permeability to the solvent of the solution, and does not show permeability to the biological substance (8) and the extracting agent (6), the second region (3b) has impermeability so that the solution, the biological substance (8) and the extracting agent (6) do not permeate, and the membrane (3) is arranged so as to face the first chamber (5a) when the solution is injected into the first chamber (5a). The second region ( 3 b ) is inclined with respect to the liquid level of the solution, and the second region ( 3 b ) is disposed on the lower side than the first region ( 3 a ) with respect to the liquid level. |