Chromium (VI) Ion |
NO.273 |
| Cr6+ |  |
 |
Performance
| Measuring Range | 0.5 to 50 mg/L |
| Sampling Time | 2 minutes |
| Detecting Limit | 0.4 mg/L |
| Colour Change | White → Yellow |
| Reaction Principle | Cr6+ + Pb(CH3COO)2 → PbCrO4 |
| Shelf Life | 3 Years |
| Corrections for temperature & humidity | Water temperature correction is necessary |
| Store the tubes at cool and dark place. | |
Possible coexisting substances and their interferences (NOTE)
| Substance | Concentration | Interference | Change colour by itself to |
| Cl- | 20 mg/L | + | No |
| CH3COO- | 20 mg/L | + | No |
| NO3- | 30 mg/L | + | No |
| S2- | 0.5 mg/L | Unclear | Brown ( 0.5 mg/L ) |
| SO42- | 10 mg/L | + | No |
| PO43- | 5 mg/L | + | No |
