Aliphatic hydrocarbons |
NO.140 |
| CH2Cl2 |  |
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Performance
| Measuring Range |
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| Number of Pump Strokes |
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| Correction Factor |
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| Sampling Time | 2 minutes per pump stroke | |||
| Detecting Limit | 1 ppm (n=2) | |||
| Colour Change | Yellow → Dark brown | |||
| Reaction Principle | Aliphatic Hydrocarbons + Cr6+ + H2SO4 → Cr3+ | |||
| Coefficient of Variation | 10% (for 20 to 1000 ppm) | |||
| Shelf Life | 2 Years | |||
| Corrections for temperature & humidity | Temperature correction is necessary | |||
| Store the tubes at cool and dark place. | ||||
| Calibration gas generation | Diffusion tube method |
| TLV-TWA | TLV-STEL | Explosive range |
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