Mercury |
NO.271 |
| Hg |  |
 |
Performance
| Measuring Range | 1 to 20 mg/L |
| Sampling Time | 5 minutes |
| Detecting Limit | 0.5 mg/L |
| Colour Change | Pale orange → Bluish purple |
| Reaction Principle | Hg + PAN (indicator) → 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 | Changes colour by itself to |
| Fe2+ | 0.5 mg/L |  |
Reddish purple ( 0.5mg/L) |
| Fe3+ | 1 mg/L | |
No ( 100mg/L) |
| Cu | 0.5 mg/ L | + | Reddish purple ( 0.5mg/L) |
| Zn | 0.5 mg/L | + | Purple ( 0.2mg/L) |
| Mn | 1 mg/L | + | Bluish purple ( 1mg/L) |
| Al | 0.5 mg/L | + | No ( 100mg/L) |
| Ni | 0.3 mg/L | + | Purple ( 0.3mg/L) |
| Co | 0.2 mg/L | + | Purple ( 0.2mg/L) |
