Methyl metacrylate |
NO.149 |
| CH2:C(CH3)CO2CH3 |  |
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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 → Pale blue | ||
| Reaction Principle | CH2:C(CH3)CO2CH3 + Cr6+ + H2SO4 → Cr3+ | ||
| Coefficient of Variation | 10% (for 10 to 50 ppm), 5% (for 50 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 |
| Alcohols, Esters, Ketones | + | Pale blue |
Other substance measurable with this detector tube
| Tube 102L Reading (n=2) | 10 | 20 | 30 | 50 | 100 | 150 | 200 |
| Allyl isothiocyanate (%) | 5 | 10 | 15 | 30 | 70 | 130 | 200 |
| Calibration gas generation | Diffusion tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 50 ppm | 100 ppm | 1.7 to 8.2% |
