| 摘要 |
A chromatographic column is terminated with a fitting for connecting the column to an end flow tube. The fitting is provided with a column terminator element comprising a solid rim-like housing having a central aperture therein and a duplex porous disc positioned within the aperture and secured to the housing. The porous disc comprises a main body portion providing pores having a first relatively higher micron rating and a thin layer on one surface providing pores having a relatively lower micron rating and a higher pressure drop thereacross. The thin layer is adapted to face toward the chromatographic column and the main body portion has a coarse pimpled surface opposite the planar surface to facilitate lateral fluid flow relative to the main body portion.
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