A centrifuge filter tube

Abstract

The present invention discloses a centrifuge filtration tube comprising a centrifuge tube (2) and a centrifuge tube (1) housed in the centrifuge tube (2). One or more constant-volume vents (7) and multiple pores (4) are provided on a sidewall of the centrifuge tube (1). The one or more constant-volume vents (7) are located above the pores (4). The pores (4) are covered with a filtering membrane (3). The disclosed centrifuge filtration tube has the advantages of being simple, easy to use, highly efficient, and inexpensive, which can save large amounts of labor and time in analyses of large number of samples.

Claims

1. A centrifuge filtration tube (1), comprising: a first centrifuge tube (1) comprising a side wall that includes one or more constant-volume vents (7) and multiple pores (4) , wherein the constant-volume vents (7) are located above the pores (4); a filtering membrane (3) that covers the pores (4); and a second centrifuge tube (2) in which the first centrifuge tube (1) is housed.

2. The centrifuge filtration tube of claim 1, wherein the one or more constant-volume vents (7) are located in an upper portion of the side wall of the centrifuge tube (1), wherein the pores (4) are located in a middle portion of the side wall of the centrifuge tube (1).

3. The centrifuge filtration tube of claim 1, wherein the centrifuge tube (1) include a top cover, wherein the one or more constant-volume vents (7) are located in the top cover of the centrifuge tube (1), wherein the pores (4) are located in a middle portion of the side wall of the centrifuge tube (1).

4. The centrifuge filtration tube of claim 1, wherein the filtering membrane is positioned on an inner wall of the centrifuge tube (2) and covers the pores (4) in the side wall of the first centrifuge tube (1).

5. The centrifuge filtration tube of claim 1, wherein the filtering membrane is a microporous membrane.

6. The centrifuge filtration tube of claim 5, wherein the filtering membrane is a polypropylene microporous membrane.

7. The centrifuge filtration tube of claim 5, wherein the filtering membrane is a polytetrafluoroethylene air filtration membrane.

8. The centrifuge filtration tube of claim 5, wherein the filtering membrane is a hydrophobic filter.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG. 1 is a schematic diagram of the disclosed centrifuge filtration tube;

[0018] FIG. 2 is a partial cross-sectional view of the centrifuge filtration tube;

[0019] wherein 1—small centrifuge tube, 2—large centrifuge tube, 3—filtering membrane; 4—pore, 5—a top cover of the small centrifuge tube 1, 6—a top cover of the large centrifuge tube, 7—constant-volume vent, 11—a side wall of the small centrifuge tube, 21—a side wall of the large centrifuge tube, and 31—a cross section of the filtering membrane.

DETAILED DESCRIPTION OF IMPLEMENTATIONS

[0020] The present invention is now described in further detail with reference to the accompanying drawings,

[0021] FIG. 1 is a schematic diagram for a centrifuge filtration tube, including: a small centrifuge tube 1; a large centrifuge tube 2, a filtering membrane 3 attached to the side wall of the small centrifuge tube 1; one or more pores 4 on the small centrifuge tube 1, a top cover 5 of the small centrifuge tube 1, a top cover 6 of the large centrifuge tube 2, and a constant-volume vent 7 on the upper portion of the small centrifuge tube 1 (the constant-volume vent 7 may be provided on the top cover 5 of the small centrifuge tube 1). A large hole is opened in the top of the large centrifuge tube 2 through which the small centrifuge tube 1 is placed into the large centrifuge tube 2. The constant-volume vent 7 is opened in the upper portion of the small centrifuge tube 1 for exhausting air and maintaining constant volume.

[0022] FIG. 2 is a cross-sectional view of the centrifuge filtration tube. The small centrifuge tube 1 includes a side wall 11. The large centrifuge tube 2 includes a side wall 21. The filtering membrane 3 has a cross section 31.

Example 1

[0023] place the liquid to be cleared in a commercially available centrifuge tube 2, place the centrifuge tube 1 therein, and start the centrifuge. Wait until the liquid flows into the centrifuge tube 1 through the pores in the side wall of the centrifuge tube 1. Depending on different pore sizes of the pores, the filtering membrane can block macromolecules or large particles away outside of the centrifuge tube 1. A relatively pure solution can thus be obtained in the centrifuge tube 1.

Example 2

[0024] The filtering members affixed to the sidewall of the centrifuge tube 1 can be formed by different types of films such as polypropylene microporous membrane, a polytetrafluoroethylene air filtration membrane, or a hydrophobic membrane, etc.