| Standard Concentration (mg/L) | DF | Absorbance | Blank-corrected Absorbance |
| Air | 0.0000 | ||
| Water | 1 | 0.0002 | |
| Blank | 1 | 0.0006 | |
| 0.20 | 1 | 0.0107 | 0.0092 |
| 0.50 | 1 | 0.0263 | 0.0244 |
| 1.00 | 1 | 0.0505 | 0.0481 |
| 5.00 | 1 | 0.2314 | 0.2274 |