| 摘要 |
In the field of substance separation which uses the flow of a fluid, it is necessary to reduce the inside diameter of a separation column in order to meet the tendency to reduce the volume of an organic solvent used. The smaller the volume of a target sample which is caused to flow, the higher the concentration of the target sample, thereby permitting a high-sensitivity analysis. For this purpose, it is necessary to reduce the diameter of a separation column. Therefore, the manufacturing of such a separation column is difficult and besides the separation column becomes apt to fracture. Therefore, the separation column is fabricated as a double-wall tube constituted by an outer tube and an inner tube in such a manner that the outer tube is separated so as to be freely inserted and extracted. Furthermore, a union is fitted to the end of the outer tube by use of a screw thereby to prevent torsions between the outer tube and the inner tube and strains and, at the same time, to eliminate a space for a dead volume. <IMAGE> |
