COOH SPE products consist of a propane carboxylic acid on the inner silica surface. The pKa of the carboxylic acid group is approximately 3.8. It is a useful sorbent for quaternary ammonium salt and other strong cations.
Based on silica; C%: 5-6%;
Average particle diameter: 50μm;
Average pore size: 60Å;
Volume of pore: 0.8cm2/g;
Specific surface area: 4802/g