초록 ▼

Liquid chromatography apparatus including a hollow cylinder and a fixed end closure in which the effective useful length of the cylinder is varied through the use of a piston member that slides within the cylinder due to force exerted by a threaded shaft that is connected to a handle. Binding of the

Liquid chromatography apparatus including a hollow cylinder and a fixed end closure in which the effective useful length of the cylinder is varied through the use of a piston member that slides within the cylinder due to force exerted by a threaded shaft that is connected to a handle. Binding of the piston member in the cylinder is prevented by a ball joint that operatively connects the piston member to the threaded shaft and by a plurality of O-rings located on the piston member that contact the inner wall of the cylinder and tend to prevent tipping of the piston member. Even liquid distribution and filtering is obtained through a 0.5 micron porous sintered stainless steel liquid distribution disk. A smooth inclined surface in combination with an uninterrupted ring provide a trap for bubbles of gas located inside the cylinder. A composite porous segmented sintered liquid distribution disk is also presented that is particularly useful for large scale liquid chromatography as is the method of manufacturing the composite segmented disk.

대표청구항 ▼

Liquid chromatography apparatus comprising an elongated hollow member having two open end portions for receiving a chromatography packing or filling material and end closure means for closing an end of said elongated hollow member having a centrally located aperture for a conduit, said end closure m

Liquid chromatography apparatus comprising an elongated hollow member having two open end portions for receiving a chromatography packing or filling material and end closure means for closing an end of said elongated hollow member having a centrally located aperture for a conduit, said end closure means having means for separating a gas from a liquid comprising an inclined surface and a centrally located substantially uninterrupted ring shaped groove located in said inclined surface close proximity to and around the centrally located conduit aperture with a substantial portion of the inclined surface sloping inward toward said substantially uninterrupted ring shaped groove and the central portion of said closure means and means in fluid communication with said substantially uninterrupted ring shaped groove for drawing off gases from said substantially uninterrupted ring shaped groove, a disk to establish and maintain even liquid distribution radially, and means to vary the position of an end closure means to vary the size of a bed of said packing or filling material.