Table 2.
Effect of type and concentration of eluting agent on recovery of analytes (N = 3).
| Eluent conditions | Recovery (%) | ||||
|---|---|---|---|---|---|
| Cd | Co | Fe | Ni | Zn | |
| H2SO4 | 57.3 | 100.0 | 63.1 | 51.7 | 44.1 |
| HNO3 | 12.2 | 58.2 | 63.1 | 49.6 | 61.8 |
| HCl | 67.2 | 88.0 | 73.6 | 80.2 | 69.8 |
| HClO4 | 58.3 | 70.5 | 100.3 | 42.4 | 25.6 |
| HCl 3 M | 71.2 | 85.6 | 75.1 | 96.4 | 63.1 |
| HCl 4 M | 82.5 | 88.6 | 79.1 | 88.6 | 70.6 |
| HCl 5 M | 94.5 | 99.5 | 102.3 | 94.5 | 95.6 |
| HCl 7 M | 81.3 | 83.1 | 89.6 | 82.4 | 66.4 |
| HCl 8 M | 80.4 | 72.5 | 87.4 | 70.5 | 59.1 |
| 5 mL HCl 5 M | 19.8 | 40.4 | 52.6 | 57.8 | 56.4 |
| 7 mL HCl 5 M | 54.0 | 59.8 | 64.3 | 70.5 | 78.1 |
| 8 mL HCl 5 M | 97.8 | 102.0 | 97.6 | 103.2 | 98.6 |
| 9 mL HCL 5 M | 37.1 | 69.6 | 75.6 | 57.8 | 87.5 |
| 12 mL HCl 5 M | 22.9 | 79.7 | 89.5 | 68.4 | 86.6 |