Tosoh's polymer-based gel filtration columns are either prepared from polymethacrylate resin (PW, PWXL and PWXL-CP) or from hydroxylated polyvinyl (Alpha and SuperAW) resin. Each resin type can be synthesized in a wide variety of different pore sizes. The four major product groups also differ from one another in average particle size. A more important distinction is, however, the range of solvents that can be used with each product line.

Hydroxylated polymethacrylate beads

• From water to 20% (under some conditions 50%) organic solvents
  • PWXL and PWXL-CP, 7-13 μm
  • PW, 12-17 μm
    

Hydroxylated polyvinyl beads

• Water and most polar organic solvents
  • SuperAW, 4-9 μm
  • Alpha, 7-13 μm

Each product group contains columns with distinctly different pore sizes, and one mixed-bed column

TSK-GEL PWXL columns cover the same pore size ranges as PW, but have smaller particle sizes and are thus more efficient. The PWXL product line also offers specialty columns for analyzing:

• Carbohydrate oligomers
• DNA and RNA fragments