| 摘要 |
PURPOSE:To minimize the dead volume, by forming a seal part between a chromatographic tube and the inner wall of a conical opening of an end seal. CONSTITUTION:An end seal 2 has an conical opening 5 on the side of contacting a chromatographic tube 1 and the diameter of the bottom thereof is made smaller than the small diameter of the chromatographic tube 1. The inner wall of the conical opening 5 is pressed against an end of the chromatographic tube 1 so that it will bite into the inner wall of the seal 2 to seal. This enables an increase in the pressure resistance between the chromatographic tube 1 and the seal 2, thereby minimizing the dead volume caused between the chromatographic tube 1 and a piping connector and permitting complete sealing under a high pressure.
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