Vinylidene chloride |
NO.130L |
| CH2:CCl2 |  |
 |
Performance
| Measuring Range |
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| Number of Pump Strokes |
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| Correction Factor |
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| Sampling Time | 1 minute per pump stroke | |||
| Detecting Limit | 0.1 ppm (n=2) | |||
| Colour Change | Yellow → Reddish brown | |||
| Reaction Principle | CH2:CCl2 + Cr6+ + H2SO4 → HCl HCl+ Base → Reddish brown product |
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| Coefficient of Variation | 10% (for 1 to 4 ppm), 5% (for 4 to 14 ppm) | |||
| Shelf Life | 2 Years | |||
| Corrections for temperature & humidity | Unnecessary | |||
| 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 |
| Ethylene | 300 ppm |  |
No |
| Vinyl chloride | 1/7 | + | Reddish brown |
| Tetrachloroethylene | 4 times | + | Reddish brown |
| Trichloroethylene | 1/1 | + | Reddish brown |
| Toluene | 500 ppm | |
No |
| Benzene | 400 ppm | |
No |
| Calibration gas generation | Permeation tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 5 ppm | - | 5.6 to 11.4% |
