Ammonia |
NO.3HM |
| NH3 |  |
 |
Performance
| Measuring Range |
|
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| Number of Pump Strokes |
|
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| Correction Factor |
|
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| Sampling Time | 1 minute per pump stroke | ||
| Detecting Limit | 0.01% (n=1) | ||
| Colour Change | Pink → Yellow | ||
| Reaction Principle | 2NH3 + H2SO4 → (NH4)2SO4 | ||
| Coefficient of Variation | 10% (for 0.05 to 0.4 %), 5% (for 0.4 to 1.6 ppm) | ||
| Shelf Life | 3 Years | ||
| Corrections for temperature & humidity | Unnecessary | ||
| Store the tubes at cool and dark place. | |||
Possible coexisting substances and their interferences (NOTE)
| Substance | Concentration | Interference | Change colour by itself to |
| Hydrazine | + | Yellow | |
| Pyridine | + | Yellow | |
| Amines other than aromatic amines | + | Yellow |
| Calibration gas generation | High pressure gas cylinder method |
| TLV-TWA | TLV-STEL | Explosive range |
| 25 ppm | 35 ppm | 15 to 28% |
