Chromatography columns, systems and methods
The present invention relates to axial flow chromatography columns, methods for separating one or more analytes in a liquid by the use of such columns, and systems employing such columns. The column comprises a first port and a second port, the first port and said second port being at essentially the same level or elevation above the level of the bed space on the chromatography column.
1. An axial flow chromatography column comprising:
a housing comprising a side wall;
axially spaced first and second end units positioned opposed to each other are separated by said side wall;
a first filter which is adjacent to said first end unit and a second filter which is adjacent to said second end unit wherein said first and second filters together with the side wall define an enclosed bed space for containing a bed of particulate medium therein;
the first end unit including a first port which is in fluid communication with said enclosed bed space for adding a liquid to or removing a liquid from the enclosed bed space;
a second port being attached directly to the first end unit and being in fluid communication with the enclosed bed space via a passageway within the second end unit connecting to a hollow member extending from the second port at the first end unit adjacent to said sidewall; and
wherein said second port is disposed at or above the same level or elevation of the first port and both the first port and the second port are above the level of the enclosed bed space of said chromatography column.
2. The chromatography column of claim 1 , wherein said hollow member is an integral part of the column.
3. The chromatography column of claim 1 , wherein said passageway extends from the enclosed bed space through a lateral wall of the second end unit.
4. The chromatography column of claim 1 , wherein the first end unit additionally includes a valve means which is in fluid communication with the enclosed bed space, the valve means includes a longitudinal member extending through said first filler and having a passageway therein, the valve being operably openable and closable to allow filling of the enclosed bed space with a particulate medium through said passageway.
5. The chromatography column of claim 4 , wherein said longitudinal member of said valve means comprises a nozzle.
6. The chromatography column of claim 5 , wherein said nozzle is fixed within the enclosed bed space or retractable to a position outwith the enclosed bed space.
7. The chromatography column of claim 1 , wherein said valve means does not allow emptying of the enclosed bed space of particulate medium.
8. The chromatography column of claim 7 , wherein said chromatography column is pre-packed with particulate medium.
9. The chromatography column of claim 7 , wherein said chromatography column is a disposable column.
10. A method for separating one or more analytes in a liquid from each other, comprising:
applying said liquid containing said one or more analytes to a chromatography column of claim 1 , said chromatography column containing a bed of particulate medium therein;
eluting said one or more analytes with a mobile phase; and
collecting fractions of said mobile phase eluting from the chromatography column.
11. A system for separating one or more analytes in a liquid from each other, said system comprising:
an inlet or inlet manifold in fluid communication with said liquid;
a pump;
a chromatography column of claim 1 ; and
an outlet or outlet manifold.
12. The system of claim 11 , further comprising a valve operably openable and closable to allow the addition of liquid to, or the removal of liquid from, the enclosed bed space.