Research Article
Inexpensive Bismuth-Film Electrode Supported on Pencil-Lead Graphite for Determination of Pb(II) and Cd(II) Ions by Anodic Stripping Voltammetry
Table 2
Experiments of 23 factorial design and response values.
| Order | C (mg L-1) | Ed (V) | td (s) | I (nA) | I (nA) |
| 1 | 150 | -1.50 | 100 | 5.31 | 7.92 | 2 | 150 | -1.50 | 250 | 16.8 | 29.3 | 3 | 250 | -1.50 | 100 | 4.71 | 9.26 | 4 | 150 | -1.10 | 250 | 18.4 | 29.3 | 5 | 250 | -1.50 | 250 | 7.02 | 14.9 | 6 | 250 | -1.10 | 250 | 6.97 | 14.9 | 7 | 150 | -1.10 | 100 | 2.75 | 3.23 | 8 | 250 | -1.10 | 100 | 1.79 | 6.37 |
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