Vinyl acetate |
NO.143 |
| CH3CO2CH:CH2 |  |
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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 | 45 seconds per pump stroke | |||
| Detecting Limit | 1 ppm (n=4) | |||
| Colour Change | White → Brown | |||
| Reaction Principle | CH3CO2CH:CH2+C6H3(CH3)3+ H2S2O7 → Condensation Polymer (Brown) | |||
| Coefficient of Variation | 15% (for 10 to 20 ppm), 10% (for 20 to 100 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 |
| Aldehydes | + | Brown | |
| Ketones | + | Brown | |
| Ethylene | 1000 ppm | + | Yellow |
| Vinyl chloride | 500 ppm | + | Yellow |
| Calibration gas generation | Diffusion tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 10 ppm | 15 ppm | 2.6 to 13.4% |
