include DAC（dynamic axial compression）columns and laboratory columns. In 2005, Hanbon developed DAC® (dynamic axial compression) column with independent intellectual property rights, and has built the world's largest production and assembly workshop for dynamic axial compression columns. The product has been continuously upgraded and has been recognized by domestic and international markets, and is exported to more than 20 countries such as India, South Korea, Norway, Hungary, Germany, the United Kingdom, and Russia. Hanbon provides users with a dynamic axial compression column with an inner diameter range from 50mm to 2000mm, providing customized services. Laboratory chromatographic column include conventional high-performance liquid chromatography columns, spring columns, dynamic axial compression columns, and multifunctional axial compression columns.

The smaller the particle size the higher the column efficiency, but the higher the price and the higher the column pressure, requiring higher pressure tolerance in the equipment hardware.

Step 3: Selecting the right column tube.

The flow rate of the prepared column: generally proportional to the square of the diameter.

DAC columns are controlled by dynamic axial compression, which enables dynamic pressure retention and prevents collapse of the column head, loss of column efficiency and poor reproducibility, etc. If a DAC column loses efficiency after prolonged use, the packing can be pushed out after removal of the column, and the column can be homogenized and loaded again. The whole reloading process is not difficult and takes about 1-2H.

octadecylsilanized silica gel column , chromatography column packed with silica gel, different columns used in hplc