Hydrogen peroxide |
NO.32 |
| H2O2 |  |
 |
Performance
| Measuring Range | 0.5 to 10 ppm |
| Number of Pump Strokes | 5 |
| Correction Factor | 1 |
| Sampling Time | 1 minute per pump stroke |
| Detecting Limit | 0.1 ppm (n=5) |
| Colour Change | White → Yellow |
| Reaction Principle | H2O2 + TiSO4 → Yellow Product |
| Coefficient of Variation | 10% (for 0.5 to 2 ppm), 5% (for 4 to 10 ppm) |
| Shelf Life | 3 Years |
| Corrections for temperature & humidity | 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 |
| Chlorine | No | No | |
| Ozone | No | No | |
| Nitrogen dioxide | No | No | |
| Acetaldehyde | 50 ppm | Unclear demarcation | No |
| Formaldehyde | 10 ppm | No |
| Calibration gas generation | Diffusion tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 1 ppm | - | - |
