| Water sample | Hg2+/µg・mL−1 | Recovery (%) | |
| Added | Found | ||
| Distilled water | 0.5 1.0 | 0.49 1.0 | 98 100 |
| Tank water (Mansoura city) | 0.5 1.0 | 0.50 1.01 | 100 101 |
| Nile water (Mansoura city) | 0.5 1.0 | 0.48 0.98 | 96 98 |
| Underground water (Mansoura city) | 0.5 1.0 | 0.46 0.96 | 92 96 |