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甲基丙烯酸乙酯检测管149，Measuring Range 10 to 200 ppm 200 to 500 ppm Number of Pump Strokes 2 1 Correction Factor 1 2.5 Sampling Time 4 minutes，异丁烯酸甲酯检测管价格，甲基丙烯酸乙酯检测管149 CH2:C(CH3)CO2CH3 Methyl metacrylate
详情介绍：
甲基丙烯酸乙酯检测管149 Methyl metacrylate No.149
CH2:C(CH3)CO2CH3
| Performance |
Measuring Range | 10 to 200 ppm | 200 to 500 ppm |
Number of PumpStrokes | 2 | 1 |
CorrectionFactor | 1 | 2.5 |
Sampling Time | 4 minutes per pumpstroke | |
Detecting Limit | 1 ppm (n=2) | |
Color Change | Yellow → Paleblue | |
Reaction Principle | CH2:C(CH3)CO2CH3 + Cr6+ + H2SO4 → Cr3+ | |
| Coefficient ofVariation | 10% (for 10 to 50ppm), 5% (for 50 to 200 ppm) | |
| ShelfLife | 2Years | |
| Correctionsfor temperature & humidity | Temperature correction is necessary | |
| Store the tubes at cool and darkplace. | ||
| Possible coexisting substances and theirinterferences | (NOTE) |
Substance | Concentration | Interference | Change color by itself |
Alcohols, Esters,Ketones | - | Plus error | Produce pale bluediscoloration |
| Othersubstance measurable with this detector tube |
Tube 149 Reading(n=2) | 10 | 20 | 30 | 50 | 100 | 150 | 200 |
Allyl isothiocyanateconc. (ppm) | 5 | 10 | 15 | 30 | 70 | 130 | 200 |
| Calibration gasgeneration | Diffusion tubemethod | |
| TLV-TWA | TLV-STEL | Explosive range |
| 50ppm | 100ppm | 1.7 to8.2% |