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乙醚无水检测管161 Ethylether (C2H5)2O
Ethylether No.161
(C2H5)2O
| Performance |
MeasuringRange | 0.04 to 1.0% |
Number of Pump Strokes | 1 |
Correction Factor | 1 |
SamplingTime | 2 minutes per pumpstroke |
DetectingLimit | 0.001% (n=1) |
ColorChange | Yellowish brown →Dark green |
ReactionPrinciple | (C2H5)2O+ Cr6+ + H2SO4 → Cr3+ |
| Coefficient ofVariation | 10% (for 0.04 to 0.2%), 5% (for 0.2 to 1.0 %) |
| ShelfLife | 3 Years |
| 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 |
Propane | 0.2% | Plus error | Produce dark greenfor whole layer |
Alcohols, Esters,Ketones | - | Plus error | Produce greenishbrown |
Aromatic HCs. | 500 ppm | Plus error | Produce greenishbrown |
Hydrogensulfide | 500 ppm | Plus error | Produce greenstain |
Sulfurdioxide | 500 ppm | Plus error | Produce greenstain |
Acetylene | 0.3% | Plus error | Greenish brown forwhole layer |
| Othersubstance measurable with this detector tube |
Substance | Correction Factor | Pump Strokes | Measuring Range |
Isopropylether | 0.45 | 2 | 0.018 to 0.45% |
Methyl ether | 0.85 | 1 | 0.03 to 0.85% |
Tetrahydrofuran | 1.4 | 1 | 0.056 to 1.4% |
| Toluene | by scale | 1 | 0.02 to0.8% |
| Calibration gasgeneration | Static gas dilutionmethod | |
| TLV-TWA | TLV-STEL | Explosive range |
| 400ppm | 500ppm | 1.9to 48% |