Iron (II) Ion |
NO.281 |
| Fe2+ |  |
 |
Performance
| Measuring Range | (5) to 50 mg/L |
| Sampling Time | 5 minutes |
| Detecting Limit | 1.0 mg/L |
| Colour Change | White → Orange |
| Reaction Principle | Fe2+ + 1,10 Fenantoroline (White) → Complex compound |
| Shelf Life | 3 Years |
| Corrections for temperature & humidity | Unnecessary |
| Store the tubes at cool and dark place. | |
Possible coexisting substances and their interferences (NOTE)
| Substance | Concentration | Interference | Change colour by itself to |
| Zn | 5 mg/L | + | No ( 100mg/L) |
| Co | 5 mg/L | + | Orange ( 1mg/L) |
| CN- | 20 mg/ L |  |
No ( 100mg/L) |
| Fe3+ | 50 mg/L | + | Pale orange ( 50 mg/L) |
| CU+ | 5 mg/L | |
Pale orange ( 1 mg/L) |
| CU2+ | 10 mg/L | + | Pale blue ( 50 mg/L) |
| Ni | 5 mg/L | + | No ( 100 mg/L) |
| Mn | 50 mg/L | |
No ( 100 mg/L ) |
| PO43- | 100 mg/L | No | No ( 100 mg/L) |
