Ammonia |
NO.3L |
| NH3 |  |
 |
Performance
| Measuring Range |
|
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| Number of Pump Strokes |
|
|||
| Correction Factor |
|
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| Sampling Time | 1 minute per pump stroke | |||
| Detecting Limit | 0.2 ppm (n=2) | |||
| Colour Change | Pink → Yellow | |||
| Reaction Principle | 2NH3 + H2SO4 → (NH4)2SO4 | |||
| Coefficient of Variation | 10% (for 1 to 10 ppm), 5% (for 10 to 30 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 |
| Carbon dioxide | 1% |  |
No |
| Hydrazine | + | Yellow | |
| Amines | 1/15 | + | Yellow ( 5 ppm) |
| Calibration gas generation | Permeation tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 25 ppm | 35 ppm | 15 to 28% |
