Nitrogen dioxide |
NO.9DL |
| NO2 |
 |
Performance
| Measuring Range | 0.01 to 3.0 ppm |
| Sampling Hours | 1 to 24 hours |
| Detecting Limit | 0.01 ppm |
| Colour Change | White → Green |
| Reaction Principle | ABTS + NO2 → Green product |
| Coefficient of Variation | 10% (for 0.01 to 3.0 ppm-hr) |
| Shelf Life | 1 Year |
| Corrections for temperature & humidity | Unnecessary |
| Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below. | |
Possible coexisting substances and their interferences (NOTE)
| Substance | Concentration | Interference | Change colour by itself to |
| Carbon monoxiide | 10ppm | No | No ( 10 ppm) |
| Chlorine | 0.07 ppm | No | No ( 0.07 ppm) |
| Ozone | 0.045 ppm | No | No ( 0.045 ppm) |
| sulphur dioxide | No ( 0.1 ppm) | ||
| Carbon dioxide | 600 ppm | No | No ( 600 ppm) |
| Formaldehyde | No ( 0.1 ppm) |
| Calibration gas generation | Permeation tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 3 ppm | 5 ppm | - |