Gastec 141L Quick-measuring Detector tubes Ethyl acetate CH3CO2C2H5 (20 ~ 800 ppm)
ManufacturerGastec(View more products from this manufacturer)
Model141L
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Indicator: 20 to 800 ppm
Measuring Range: 20 to 800 ppm, Number of Pump Strokes 2
Sampling Time: 2 minute per pump stroke
Colour Change: Yellow → Blackish brown → Light blue after few minute
Reaction Principle: CH3CO2C2H5 + Cr6+ + H2SO4 → Cr3+
Coefficient of Variation: 15% (for 20 to 200 ppm), 10% (for 200 to 800 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Performance
| Measuring Range | 20 to 800 ppm |
| Number of Pump Strokes | 2 |
| Correction Factor | 1 |
| Sampling Time | 2 minutes per pump stroke |
| Detecting Limit | 5 ppm (n=2) |
| Colour Change | Yellow → Blackish brown → Light blue after few minute |
| Reaction Principle | CH3CO2C2H5 + Cr6+ + H2SO4 → Cr3+ |
| Coefficient of Variation | 15% (for 20 to 200 ppm), 10% (for 200 to 800 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 | + | Dark green | |
| Ketones | + | Dark green | |
| Esters | + | Dark green | |
| Aromatic HCs | + | Dark green |
Other substance measurable with this detector tube
| Substance | Correction Factor | No. of pump strokes | Measuring Range |
| Cymene | Factor: 0.28 | 2 | 5.6 to 224 ppm |
| Diisopropyl benzene | Factor: 0.5 | 1/2 | 10 to 400 ppm |
| Ethyl acrylate | Factor: 0.4 | 2 | 8 to 320 ppm |
| 2-Hexyl alcohol | Factor: 3.0 | 3 | 60 to 2400 ppm |
| Isopropyl ether | Factor: 0.9 | 2 | 18 to 720 ppm |
| Mesityl oxide | Factor: 1.35 | 2 | 27 to 1080 ppm |
| Methyl acrylate | Factor: 0.4 | 2 | 8 to 320 ppm |
| Methyl Isothiocyanate | by scale | 2 | 50 to 400 ppm |
| Calibration gas generation | Diffusion tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 400 ppm(2014) | - | 2 to 11.5% |
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