Table 6.
The efficiency of DNA sorption on CaPs at different DNA concentrations in the presence of additional ions. DNA (25–100 μg/mL) sorption was carried out on CaPs (0.93 mg/mL) in the presence of 0,05 and 1 mM of Ca2+ or Mg2+. The solutions of DNA and CaCl2 or MgSO4 were added to a suspension of CaPs, and sorption was carried out for 24 h at room temperature. The efficiency of DNA sorption was calculated as the difference between the amount of DNA added and that remaining in the supernatant.
| DNA Concentration, μg/mL | 25 | 50 | 75 | 100 | |
|---|---|---|---|---|---|
| Mg2+ | 0.05 mM | 20.3% | 19.3% | 11.7% | 3.8% |
| 1 mM | 34.7% | 27.0% | 21.3% | 18.7% | |
| Ca2+ | 0.05 mM | 31.0% | 18.1% | 18.0% | 16.8% |
| 1 mM | 40.2% | 35.3% | 29.5% | 25.9% | |