sulphide Ion |
NO.211 |
| S2- |  |
 |
Performance
| Measuring Range | 1 to 100 ppm |
| Sampling Time | 2 minutes |
| Detecting Limit | 0.5 ppm |
| Colour Change | White → Brown |
| Reaction Principle | S2- + Pb(CH3COO)2 → PbS |
| 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 |
| CO32- | 500 ppm | + | No |
| Cl- | 5000 ppm | + | No |
| CrO42- | 25 ppm |  |
Yellow |
| SO32- | 300 ppm | |
No |
| S2O32- | 50 ppm | Unclear demarcation | No |
