Abstract: The invention discloses an apparatus (1) for aligning and supporting a first (2) and a second (3) length of thermoplastic tubing, preparatory to and during cutting and welding of said lengths of tubing, where the apparatus comprises the following components arranged on a base support (4): a) a first holder (5) arranged to accommodate portions of the first and second lengths of tubing in a first (6) and a second (7) elongated holding space respectively, wherein the holding spaces are essentially parallel to each other and separated from each other by a first distance (8); b) a second holder (9) arranged to accommodate portions of the first and second lengths of tubing in a third (10) and a fourth (11) elongated holding space respectively, wherein the holding spaces are essentially parallel to each other and to the holding spaces in the first holder and separated from each other by a second distance (12) substantially the same as the first distance (8), and wherein said second holder is movable in a direction

Abstract: The invention relates to a chromatography column assembly that offers an affordable self-packed column for performing chromatographic separation. The chromatography column assembly comprises a column tube having a first and a second opening at substantially opposite ends, and an end cap of either a snap fit design or a bolted design. The column assembly may further include an adaptor shaft inserted into the column through the end cap for achieving a desired bed volume. The column assembly may also include a second end cap enclosing the second opening, and an optional adaptor shaft may be inserted into the column through the second end cap, enabling further adjustment of the bed volume.