Nitric acid |
NO.15L |
| HNO3 |  |
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Performance
| Measuring Range |
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| Number of Pump Strokes |
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| Correction Factor |
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| Sampling Time | 45 seconds per pump stroke | |||
| Detecting Limit | 0.05 ppm (n=10) | |||
| Colour Change | Yellow →Reddish purple | |||
| Reaction Principle | HNO3 + Indicator → Chemical reaction product | |||
| Coefficient of Variation | 15% (for 1 to 5 ppm), 10% (for 5 to 20 ppm) | |||
| Shelf Life | 3 Years | |||
| Corrections for temperature & humidity | Humidity 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 |
| Hydrogen chloride | 1/10 time | + | Reddish purple |
| Chlorine | No | Breaches | |
| Carbon monoxide | No | No | |
| Nitrogen dioxide | No | No | |
| Organic solvents | No | No |
Other substance measurable with this detector tube
| Substance | Correction Factor | No. of pump strokes | Measuring Range |
| Hydrogen bromide | 0.8 | 1 | 0.8 to 16 ppm |
| Trichloroacetic acid | by scale | 1 | 1 to 37.5 ppm |
| Calibration gas generation | High pressure gas cylinder method |
| TLV-TWA | TLV-STEL | Explosive range |
| 2 ppm | 4 ppm | - |
