| Working Std. Sol (mL) | Dilute to (mL) | Concentration of Mn Standards mg/L |
| 0.00 | 100 | 0.00 |
| 0.02 | 100 | 0.02 |
| 0.05 | 100 | 0.50 |
| 0,10 | 100 | 1.00 |
| 0.50 | 100 | 5.00 |