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Comparison of Cr-SPE, HMDE and AAS for the determination of Zn(II), Cd(II), Pb(II) and Cu(II) in real wastewater samples.
| Type of Measurement | Zn(II) (mg∙L−1) | Cd(II) (mg∙L−1) | Pb(II) (mg∙L−1) | Cu(II) (mg∙L−1) |
|---|---|---|---|---|
| Cr-SPE | 2.6 ± 0.8 | 3.5 ± 0.7 | 5.7 ± 1.1 | 7.9 ± 0.6 |
| HMDE 1 | 6.2 ± 0.5 | 3.9 ± 0.3 | 4.7 ± 0.3 | 8.3 ± 0.5 |
| AAS | 6.6 ± 0.01 | 4.2 ± 0.04 | 4.8 ± 0.02 | 8.8 ± 0.01 |
1 HMDE—hanging mercury drop electrode.
