| 摘要 |
<p>A chromatographic device in which a chromatographic column pivots on a compression cylinder. Prior to pivoting, one end of the column is sealed with an end cap (204), the column is at least partially filled with a chromatographic medium (82) and a piston (46) is frictionally engaged within the column. The chromatographic column is then pivoted onto the compression cylinder, and the compression device is operated to push the piston (46) into the column with a telescoping rod. The telescoping rod is then retracted, leaving the piston (46) in place. The chromatographic column is then removed from the compression cylinder. A spring assembly is then inserted into the column above the piston (46), and held in place with a torque mechanism (84) mounted on the chromatographic column. The torque mechanism (84) includes a bolt (86) that can be tightened to provide a variable spring pressure against the piston (46). A rotating coupling is provided so that the chromatographic column and compression column can be operated in at least two different directions to facilitate the removal of the medium (82) from the chromatographic column after use.</p> |
