Table 1.
Cr(VI) measurement from artificial wastewater by atomic absorption spectroscopy and MFC biosensor.
| Standard Cr(VI) Concentration of (mg/L) | ||||||
|---|---|---|---|---|---|---|
| 0.05 | 0.1 | 0.25 | 0.5 | 1.5 | 3.5 | |
| AAS 1 | 0.051 ± 0.01 | 0.112 ± 0.01 | 0.25 ± 0.02 | 0.53 ± 0.03 | 1.58 ± 0.02 | 3.46 ± 0.05 |
| MFC biosensor | 0.053 ± 0.01 | 0.109 ± 0.02 | 0.26 ± 0.06 | 0.51 ± 0.02 | 1.72 ± 0.01 | 3.80 ± 0.03 |
| Deviation (%) 2 | 2 | 12 | 0 | 6 | 5.3 | −1.1 |
| Deviation (%) 3 | 6 | 9 | 4 | 2 | 14.7 | 8.6 |
| Deviation (%) 4 | 3.9 | −1.8 | 4 | −3.8 | 8.9 | 9.8 |
1 Modified atomic absorption spectroscopy technique; 2 The determined value by atomic absorption spectroscopy compared to standard Cr(VI) concentration; 3 The determined value by MFC biosensor compared to standard Cr(VI) concentration; 4 The determined value by MFC biosensor compared to that by modified atomic absorption spectroscopy technique.