Table 5.
Results of separation experiments.
| n | Calcium mass (mg) | mL of conc. HCl added for dissolution | Molarity of dissolutiona (mol/L) | UTEVA mass (mg) | % of activity trapped in UTEVA | % of total activity eluted in 1st fraction (400 μL DI) | % of total activity eluted in 2nd fraction (200 μL DI) | |
|---|---|---|---|---|---|---|---|---|
| a) | 1 | 295.7 | 5 | ~9.1 | 24.5 | 52 | 43 | 2.5 |
| b) | 3 | 313 ± 14 | 5–5.5 | ~9.1 | 52 ± 1 | 83 ± 5 | 68 ± 4 | 4.7 ± 1.6 |
| c) | 7 | 317 ± 22 | 10 | ~10.5 | 52 ± 3 | 89 ± 3 | 80 ± 4 | 5.1 ± 1. 3 |
| d) | 6 | 304 ± 8 | 15 | ~11.1 | 52 ± 1 | 92 ± 2 | 82 ± 2 | 5.6 ± 2.7 |
a
The molarity is estimated by subtracting the amount of moles of hydrogen released as H2 gas from the amount of moles of H+ ions in solution, and then diving this by the total volume of the dissolution. The amount of H2 that is released is estimated from the reaction equation Ca+2HCl→CaCl2+H2.