Indicator: 25 ~ 150 ppm
Measuring Range: 3 ~ 150 ppm
Sampling Hours: 1 to 8 hours
Colour Change: Yellow → Purple
Reaction Principle: Cl2C:CCl2 + PbO2 + H2SO4 → HCl, HCl + Base → Chloride
Coefficient of Variation: 15% (for 25 to 50 ppm-hr), 10% (for 50 to 150 ppm-hr)
Nr. of tests: 10
Detail
Performance
| Measuring Range | 3 to 150 ppm |
| Sampling Hours | 1 to 8 hours |
| Colour Change | Yellow → Purple |
| Reaction Principle | Cl2C:CCl2 + PbO2 + H2SO4 → HCl HCl + Base → Chloride |
| Coefficient of Variation | 15% (for 25 to 50 ppm-hr), 10% (for 50 to 150 ppm-hr) |
| 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 | Interference | Change colour by itself to |
| Hydrogen chloride, Chlorine | + | Purple |
| 1,2-Dichloroethylene, Trichloroethylene | + | Purple |
| Toluene, Xylene | No | No |
| Calibration gas generation | Diffusion tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 25 ppm(2014) | 100 ppm(2014) | - |
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