| C6H5NH2 |
 |
Performance
| Measuring Range |
| 1.25 to 2.5 ppm |
2.5 to 30 ppm |
30 to 60 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
3 minutes per pump stroke |
| Detecting Limit |
0.25 ppm (n=5) |
| Colour Change |
Pale yellow → Pale green |
| Reaction Principle |
C6H5NH2 + Cr6+ → Cr3+ |
| Coefficient of Variation |
10% (for 2.5 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 |
| Ammonia |
1/10 time |
+ |
No |
| Amines |
1/10 time |
+ |
No |
| Aromatic amines |
|
+ |
Pale green |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
| N-methylaniline |
Factor:1.4 |
2 |
3.5 to 42 ppm |
| N,N-Dimethylaniline |
Factor:1.0 |
3 |
2.5 to 30 ppm |
| o-Toluidine |
Factor: 2.0 |
2 |
5 to 60 ppm |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 2 ppm |
- |
1.3 to 11% |
