| Methyl metacrylate | CH2:C(CH3)CO2CH3 | NO.149 |
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| Performance |
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Measuring Range |
10 to 200 ppm |
200 to 500 ppm |
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Number of Pump Strokes |
2 |
1 |
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Correction Factor |
1 |
2.5 |
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Sampling Time |
4 minutes per pump stroke |
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Detecting Limit |
1 ppm (n=2) |
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Color Change |
Yellow |
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Reaction Principle |
Methyl methacrylate is reduced by cromic acid to produce pale blue stain. |
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| Coefficient of Variation |
10% (for 10 to 50 ppm), 5% (for 50 to 200 ppm) |
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| 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) |
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Substance |
Concentration |
Interference |
Change color by itself |
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Alcohols, Esters, Ketones |
- |
Plus error |
Produce pale blue discoloration |
| Other substance measurable with this detector tube |
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Tube 149 Reading (n=2) |
10 |
20 |
30 |
50 |
100 |
150 |
200 |
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Allyl isothiocyanate conc. (ppm) |
5 |
10 |
15 |
30 |
70 |
130 |
200 |
| Calibration gas generation | Diffusion tube method | |
| TLV-TWA | TLV-STEL | Explosive range |
| 50ppm | 100ppm | 1.7 to 8.2% |
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| Copyright(c) 2001 GASTEC CORPORATION. All rights reserved. |
Pale blue