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Estimated surface charge densities for strong cation-exchange stationary phases
| Stationary phase | Surface charge density, C/m2 |
|---|---|
| SP Sepharose | 0.36–0.50 |
| Toyopearl SP 650 C | 0.44–0.63 |
| Toyopearl SP 550 C | 0.066–0.099 |
| SP Spherodex | 0.17 |
These values were determined from manufacturers' ion-exchange capacity information and surface area estimates based on pore size distributions (20).
