Table 5 Effect of some ions on the recovery of Cd, Cu, and Pb [sample volume, 50 mL; amount of the metal ion, 10 μg; pH 8]
Interfering ion concentration (μg mL− 1) | Interfering ion concentration (μg mL− 1) | Recovery (R%)a | ||
|---|---|---|---|---|
Cd | Cu | Pb | ||
– | – | 99 | 97 | 96 |
Na+ | 25 | 98 | 96 | 96 |
50 | 98 | 96 | 95 | |
500 | 96 | 95 | 95 | |
1000 | 95 | 94 | 93 | |
K+ | 25 | 98 | 97 | 96 |
50 | 98 | 97 | 96 | |
500 | 96 | 96 | 95 | |
1000 | 93 | 95 | 95 | |
Mg2+ | 2 | 98 | 97 | 96 |
5 | 97 | 97 | 94 | |
10 | 94 | 93 | 92 | |
Ca2+ | 2 | 98 | 97 | 96 |
5 | 96 | 96 | 94 | |
10 | 94 | 92 | 93 | |
Co | 5 | 98 | 97 | 96 |
10 | 97 | 97 | 96 | |
25 | 96 | 95 | 94 | |
Cr | 5 | 98 | 97 | 96 |
10 | 97 | 96 | 95 | |
25 | 96 | 96 | 94 | |
Fe | 5 | 98 | 97 | 96 |
10 | 97 | 97 | 95 | |
25 | 96 | 95 | 92 | |
Mn | 5 | 98 | 97 | 96 |
10 | 97 | 97 | 95 | |
25 | 97 | 96 | 92 | |
Ni | 5 | 98 | 97 | 96 |
10 | 97 | 96 | 95 | |
25 | 95 | 97 | 93 | |
Zn | 5 | 98 | 97 | 96 |
10 | 97 | 96 | 94 | |
25 | 96 | 95 | 92 | |