Ozone in Water |
NO.218 |
| O3 |  |
 |
Performance
| Measuring Range | (1) to 10 mg/L |
| Sampling Time | 3 minutes |
| Detecting Limit | 0.5 mg/L |
| Colour Change | White → Pale blue |
| Reaction Principle | Ozone react with indigo to produce chemical reaction products to discolour the reagent to white. 2O3 + C16H10N2O2 → 2C8H5NO2 + 2O2 |
| 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 |
| H2O2 | 0.05 mg/l |  |
No |
| ClO- | 5(Cl) mg/l | |
White for whole layer higher than 500mg/l (Not produce demarcation) |
| 500(Cl) mg/l | |||
| Acid (H+) | + | No | |
| Alkali (OH-) | |
No |
