Patent ID: 8496819

Claim:
A separation column for a liquid chromatograph apparatus having a monolithic rod being arranged in a center and made of a porous body and having an uneven outer surface, a filler layer arranged such that it encircles the monolithic rod, a cylindrical support medium arranged outside the filler layer, a filter positioned on the end of the monolithic rod, and a sealant arranged on the outer circumference of the filter, wherein: the filler layer is formed by densely filling a tube-like space between the monolithic rod and the support medium with particles or beads, the particles or beads have a diameter that is 1 to 2 μm and is smaller than the unevenness on the outer surface of the monolithic rod, the monolithic rod has an outside diameter of 1.2 to 2.8 mm, and the diameter of the filter is larger than the outer diameter of the monolithic rod and smaller than the inner diameter of the support medium.