| Metal | Conc. In sample (mg/L) | Amount added (mg/L) | Conc. in spiked sample (mg/L) | Amount recovered (mg/L) | Recovery (%) |
| Na | 84.3 ± 1.7 | 200 | 302.1 ± 0.85 | 217.8 | 108.9 ± 2.64 |
| K | 2882.9 ± 3.7 | 200 | 3089.1 ± 3.2 | 206.2 | 103.1 ± 0.93 |
| Mg | 2479.2 ± 4.2 | 200 | 2672.5 ± 7.1 | 193.3 | 96.7 ± 3.08 |
| Ca | 1352.6 ± 10.4 | 200 | 1539.6 ± 6.5 | 187.0 | 93.5 ± 3.48 |
| Mn | 56.1 ± 0.2 | 200 | 238.3 ± 1.1 | 182.2 | 91.1 ± 0.44 |
| Cu | 42 ± 3.5 | 200 | 258.7 ± 4.5 | 216.7 | 108.4 ± 0.52 |
| Zn | 45.2 ± 6.2 | 200 | 254.3 ± 7.4 | 209.1 | 104.6 ± 2.1 |
| Fe | 223 ± 1.1 | 200 | 412.3 ± 0.5 | 189.3 | 94.7 ± 0.76 |
| Pb | 0.130 ± 0.002 | 200 | 213.1 ± 0.002 | 200.8 | 106.4 ± 0.20 |
| Cd | ND | – | – | – | – |