Chloroform |
NO.137LL |
| CHCl3 |  |
 |
Performance
| Measuring Range |
|
|
| Number of Pump Strokes |
|
|
| Correction Factor |
|
|
| Sampling Time | 2 minutes per pump stroke | |
| Detecting Limit | 0.2 ppm (n=4) | |
| Colour Change | White → Pale purple | |
| Reaction Principle | CHCl3 + I2O5 + H2S2O7 → Cl2 Cl2 + 3.3'-DIMETHYLNAPHTHIDINE→ reaction product |
|
| Coefficient of Variation | 10% (for 0.3 to 1.5 ppm), 5% (for 1.5 to 4.5 ppm) | |
| Shelf Life | 1 Year | |
| Corrections for temperature & humidity | Temperature correction is necessary | |
| Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below. | ||
Possible coexisting substances and their interferences (NOTE)
| Substance | Concentration | Interference | Change colour by itself to |
| Chlorine |  6ppm |
+ | Pale purple |
| Bromine |  4.5ppm |
No | No |
| Iodine | 4.5ppm |
No | No |
| 1,1,1-trichloroethane | + | Pale purple | |
| trichloroethylene | + | Pale purple |
| Calibration gas generation | Diffusion tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 10 ppm | - | - |
