New analytical spiral tube assembly for separation of proteins by counter-current chromatography

A new spiral column assembly for analytical separation by counter-current chromatography is described. The column is made from a plastic spiral tube support which has 12 interwoven spiral grooves. The PTFE tubing of 1.6 mm ID was first flattened by extruding through a narrow slit and inserted into the grooves to make 5 spiral layers with about 60 ml capacity. The performance of the spiral column assembly was tested with separation of three stable protein samples including cytochrome C, myoglobin and lysozyme in a polymer phase system composed of polyethylene glycol 1000 and dibasic potassium phosphate each at 12.5% (w/w) in water. At 2 ml/min, three protein samples were well resolved in 1 h. The separation time may be further shortened by application of higher revolution speed and flow rate by improving the strength of the spiral tube support in the future. Published by Elsevier B.V.