| NH3 |
 |
Performance
| Measuring Range |
| 0.2 to 1% |
1 to 16% |
16 to 32% |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
1 minute per pump stroke |
| Detecting Limit |
0.05% (n=5) |
| Colour Change |
Purple → Yellow |
| Reaction Principle |
3NH3 + H3PO4 → (NH4)3PO4 |
| Coefficient of Variation |
10% (for 1 to 4 %), 5% (for 6 to 16 %) |
| 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 |
| Amines other than aromatic amines |
|
+ |
Yellow |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
| Dimethylamine |
1.2 |
1 |
1.2 to 19.2% |
| Calibration gas generation |
High pressure gas cylinder method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 25 ppm |
35 ppm |
15 to 28% |
