sulphide Ion |
NO.211LL |
| S2- |  |
 |
Performance
| Measuring Range | 0.5 to 20 ppm |
| Sampling Time | 2 minutes |
| Detecting Limit | 0.2 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 | Change colour by itself to |
| SO32- | 20 ppm | No | No ( 1%) |
| Cl- | 100 ppm | No | No ( 5%) |
| Cr6+ | 0.2 ppm |  |
Yellow ( 1ppm) |
| CO32- | 500 ppm | No | No ( 1%) |
| S2O32- | 20 ppm | No | No ( 1%) |
| I- | 200 ppm | No | Yellow ( 3000ppm) |
| SO42- | 100 ppm | No | No( 1%) |
| PO43- | 100 ppm | No | No ( 1%) |
