| Type of water (location) |
Cu(II) added (mM) |
AAS |
Spectrophotometry |
| Recovery, % |
RSD, % |
Recovery, % |
RSD, % |
| Distilled water |
0 |
0.0 |
0.0 |
0.0 |
0.0 |
| 5.0 |
99.8 |
1.80 |
99.7 |
1.6 |
| 10.0 |
95.8.0 |
1.5 |
99.0 |
2.8 |
| 15 |
100.0 |
2.0 |
98.5 |
1.0 |
Tap water
(Our laboratory) |
0 |
0.0 |
0.0 |
0.0 |
0.0 |
| 5.0 |
99.6 |
1.6 |
99.6 |
2.3 |
| 10.0 |
99.8 |
2.8 |
100 |
1.5 |
| 15 |
99.4 |
1.0 |
100.0 |
2.0 |
Nile water
(Mansoura City) |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
| 5 |
99.9 |
2.3 |
99.7 |
1.6 |
| 10 |
99.4 |
1.5 |
99.8 |
2.1 |
| 15 |
99.6 |
2.0 |
100 |
1.8 |
Sea water
(Demiate City) |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
| 5 |
99.8 |
2.3 |
99.7 |
2.5 |
| 10 |
100.0 |
1.5 |
99.8 |
1.9 |
| 15 |
100.0 |
2.00 |
100 |
1.4 |
Sea water
(Ras El-Barr) |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
| 5 |
99.6 |
2.5 |
99.7 |
2.3 |
| 10 |
100 |
1.9 |
99.8 |
1.5 |
| 15 |
100 |
1.4 |
100 |
2.00 |
|
