Provided herein is technology relating to filtration and particularly, but not exclusively, to filters and methods for filtering by means of centrifugation.
1. A spin filter comprising
a) a hollow body ( 1 );
b) a bottom end ( 2 ); and
c) an opening ( 3 ) at a top end of said hollow body ( 1 ), opposite the bottom end ( 2 ),
wherein the hollow body ( 1 ) and said bottom end ( 2 ) are both composed of the same porous filtering material.
2. The spin filter of claim 1 wherein the porous filtering material is polyethylene.
3. The spin filter of claim 1 wherein the porous filtering material has a nominal pore size of 20 micrometers.
4. The spin filter of claim 1 wherein the bottom end ( 2 ) has a shape selected from the group consisting of a hemisphere, a disc, a cone, or a portion of an ellipsoid.
5. A spin filter assembly comprising the spin filter of claim 1 and a collection vessel adapted to receive the spin filter.
6. A kit comprising the spin filter of claim 1 and an instruction for use.
7. The kit of claim 6 , further comprising a collection vessel adapted to receive the spin filter.