| 摘要 |
PURPOSE:To prevent the generation of the deposition of a sample component near a column outlet arising from the pressure drop of a column by connecting a pressurizing means to the flow passage of the column outlet. CONSTITUTION:Fluid 11 for pressure regulation is joined to a part 9 of the flow passage on the downstream side of the column from a pump 10 for pressurization. While materials such as carbon dioxide, ammonia and nitrogen are usable for the fluid 11 for pressure regulation, the same material as the material of moving phase fluid is preferably used. Both of a pump 2 for the moving phase and the pump 10 for pressurization are pumps of a constant pressure control system and are controlled by a pump control section 13 which takes in the signals of pressure sensors 8, 12. The inside of the flow passage near the column outlet is maintained under a high pressure in this way and the deposition of the sample component near the column outlet is prevented. |
