Liquid chromatography has been generally used for isolation, analysis, and separation of components of samples in fields such as organic chemistry, biochemistry, medicine, food science, and environmental science. There is a trend in the reduction in size of liquid chromatography apparatuses, and the capacity of their columns has been reduced.
As discussed in Patent Documents 1 and 2, column devices for liquid chromatography include a cylindrical column body which holds a column filler, and a pair of end caps which covers both ends of the column body, each end cap having a flow hole for the carrier liquid arranged in the center thereof, respectively. A pipe for introducing and delivering the carrier liquid is connected at an end on the side of an opening of the flow hole of the end cap.
USPTO Backgrounds
USPTO Backgrounds