Sample | Amount taken/mg | Found by the proposed method/mg | Recovery/% | ||||||
---|---|---|---|---|---|---|---|---|---|
Al | Pb | Zn | Al | Pb | Zn | Al | Pb | Zn | |
1. | 20 | 50 | 20 | 19.88 ± 0.12 | 49.95 ± 0.17 | 20.02 ± 0.07 | 99.4 | 99.9 | 100.1 |
2. | 10 | 40 | 15 | 10.02 ± 0.07 | 40.16 ± 0.20 | 14.97 ± 0.11 | 100.2 | 100.4 | 99.8 |
3. | 5 | 30 | 10 | 4.97 ± 0.02 | 30.15 ± 0.19 | 10.06 ± 0.05 | 99.4 | 100.5 | 100.6 |
4. | 5 | 5 | 5 | 4.98 ± 0.03 | 5.02 ± 0.5 | 5.03 ± 0.07 | 99.6 | 100.4 | 100.6 |