1,1,1-Trichloroethane |
NO.135L |
| CH3CCl3 |  |
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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 | 3 minutes per pump stroke | |||
| Detecting Limit | 3 ppm (n=2) | |||
| Colour Change | White → Pale Pink | |||
| Reaction Principle | 1,1,1-Trichloroethane reacts with oxidizing agent to produce intermediate products then it reacts with detecting agent to produce pale pink stain. | |||
| Coefficient of Variation | 10% (for 20 to 60 ppm), 5% (for 60 to 200 ppm) | |||
| 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 |
| Halogens | + | Pale pink | |
| Nitrogen oxides | + | Pale pink | |
| Saturated halogenated hydrocarbons | + | Pale pink |
Other substance measurable with this detector tube
| Substance | Correction Factor | No. of pump strokes | Measuring Range |
| 1,2-Dichloroethane | 5.2 | 1 | 104 to 1040 ppm |
| 1,1,2,2-Tetrabromoethane | 0.046 | 4 | 0.92 to 9.2 ppm |
| 1,2,3-Trichloropropane | 1.8 | 4 | 36 to 360 ppm |
| Calibration gas generation | Diffusion tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 350 ppm | 450 ppm | - |
