Toluene |
NO.122 |
| C6H5CH3 |  |
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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 | 1.5 minutes per pump stroke | |||
| Detecting Limit | 1 ppm (n=2) | |||
| Colour Change | White → Brown | |||
| Reaction Principle | C6H5CH3 + I2O5 + H2SO4 → I2 | |||
| Coefficient of Variation | 10% (for 10 to 100 ppm), 5% (for 200 to 300 ppm) | |||
| Shelf Life | 3 Years | |||
| Corrections for temperature & humidity | Unnecessary | |||
| Store the tubes at cool and dark place. | ||||
Possible coexisting substances and their interferences (NOTE)
| Substance | Concentration | Interference | Change colour by itself to |
| Carbon Monoxide | �� 1000 ppm | No(Two layers) | Pale brown |
| Acetylene | �� 2000 ppm | No(Two layers) | Pale brown |
| Xylene | �� 1/5 time | + | Brown |
| Hexane | �� 2000 ppm | No(Two layers) | Pale brown |
| Benzene | �� 1/5 time | + | Pale yellow |
| Calibration gas generation | Diffusion tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 20 ppm | - | 1.4 to 6.7% |
