Methyl Iodide |
NO.230H |
| CH3I |  |
 |
Performance
| Measuring Range | 100 to 6000 ppm | 6000 to 15000 ppm | 15000 to 34800 ppm |
| Number of Pump Strokes | 2 | 1 | 1/2 |
| Correction Factor | 1 | 2.5 | 5.8 |
| Sampling Time | 1.5 minutes per pump stroke | ||
| Detecting Limit | 5ppm (n=2) | ||
| Colour Change | White →Dark brown | ||
| Reaction Principle | CH3I + I2O5 → I2 | ||
| Coefficient of Variation | 5% (for 100 to 6000ppm) | ||
| Shelf Life | 2 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 |
| Carbon monoxide |  20ppm |
+ | Pale brown (pale green at the end of staining) |
| Carbon dioxide | No | No | |
| Ethylene | + | Pale yellow | |
| Hexane | + | Pale orange |
| Calibration gas generation | Diffusion tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 2 ppm | - | - |
