Composite column for use in high pressure liquid chromatography

A chromatography column, which comprises:

• a) an inner tube extending along a longitudinal axis from an inner tube first end to an inner tube second end, wherein an inner lumen defined by an inner annular surface extends through the inner tube to the inner tube first and second ends, and wherein the inner tube has an annular outer surface providing an inner tube outer diameter;
• and
• b) an outer tube extending along the longitudinal axis from an outer tube first end to an outer tube second end, wherein an outer lumen defined by outer annular surface extends through the outer tube to the first and second outer tube ends, and wherein the outer tube has an annular outer surface providing an outer tube outer diameter,
• c) wherein the outer lumen through the outer tube is sized to receive the annular outer surface of the inner tube is a snug-fit relationship so that the inner tube resides inside the outer tube.

A method for providing a chromatography column, comprising the steps of:

• a) providing an inner tube extending along a longitudinal axis from an inner tube first end to an inner tube second end, an inner lumen defined by an inner annular surface extending through the inner tube to the inner tube first and second ends, wherein the inner tube has an annular outer surface providing an inner tube outer diameter;
• b) providing a middle tube extending along the longitudinal axis from a middle tube first end to a middle tube second end, a middle lumen defined by middle annular surface extending through the middle tube to the middle tube first and second ends, wherein the middle tube has an annular outer surface providing a middle tube outer diameter;
• c) providing an outer tube extending along the longitudinal axis from an outer tube first end to an outer tube second end, an outer lumen defined by outer annular surface extending through the outer tube to the first and second outer tube ends, wherein the outer tube has an annular outer surface providing an outer tube outer diameter;
• and
• d) assembling the inner tube residing inside the middle tube and the middle tube residing inside the outer tube to thereby provide the chromatography column.