Pyridine |
NO.182 |
| C5H5N |  |
 |
Performance
| Measuring Range |
|
|||
| Number of Pump Strokes |
|
|||
| Correction Factor |
|
|||
| Sampling Time | 2 minutes per pump stroke | |||
| Detecting Limit | 0.1 ppm (n=2) | |||
| Colour Change | Pink → Yellow | |||
| Reaction Principle | C5H5N + H2SO4 → C5H5N - H2SO4 | |||
| Coefficient of Variation | 10% (for 0.5 to 4 ppm), 5% (for 4 to 14 ppm) | |||
| Shelf Life | 3 Years | |||
| Corrections for temperature & humidity | Temperature 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 |
| Aromatic amines | + | Yellow | |
| Aliphatic amines | + | Yellow | |
| Ammomia | + | Yellow | |
| Hydrazine | + | Yellow |
Other substance measurable with this detector tube
| Substance | Correction Factor | No. of pump strokes | Measuring Range |
| 4-Methyl pyridine | 0.75 | 1 | 0.38 to 10.5 ppm |
| Calibration gas generation | Diffusion tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 5 ppm | - | 1.8 to 12.4 % |
