| 摘要 |
PCT No. PCT/EP94/01701 Sec. 371 Date Jan. 20, 1995 Sec. 102(e) Date Jan. 20, 1995 PCT Filed May 24, 1994 PCT Pub. No. WO94/27724 PCT Pub. Date Dec. 8, 1994A method and device for concentrating macromolecules from a solution is provided by spinning a concentrated device in a centrifuge. The device has a sample reservoir (1) for receiving a sample to be concentrated or purified, a filter for filtering the sample, a centrifuge tube (5) for collecting the filtrate, and a concentrate pocket (4) for retaining the concentrate. A portion of the sample reservoir (1) is a filtration chamber (3) having a volume which is only a small fraction of the total volume of the sample reservoir. The filter is arranged in a sidewall of the filtration chamber, and the concentrate pocket (4) is arranged in a bottom wall of the filtration chamber. Liquid sample is placed in the sample reservoir, and a unit including the sample reservoir (1) and the filter (2) is placed, at least partially, into the centrifuge tube for collecting the filtrate. As a result of centrifugal force, a force vector is created acting on the macromolecules and sweeping the filter surface, and the macromolecules are collected in the concentrate pocket (4) away from the filter surface. |
