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二氯甲烷检测管138
点击次数：187发布时间：2012/3/20 10:43:58
更新日期：2012/9/21 14:20:44
所 在 地：其它
产品型号：138
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简单介绍
二氯甲烷检测管138 Methylene chloride，Measuring Range 20 to 50 ppm 50 to 500 ppm，醋酸乙烯酯检测管143 Vinyl acetate，三氯乙烯检测管132M Trichloroethylene
二氯甲烷检测管138 Methylene chloride
的详细介绍二氯甲烷检测管138 Methylene chloride
Methylene chloride No.138
CH2Cl2
| Performance |
| Measuring Range | 20 to 50 ppm | 50 to 500 ppm |
| Number of Pump Stroke | 2 | 1 |
| Correction Factor | 0.4 | 1 |
| SamplingTime | 3 minutes per pumpstroke | |
| DetectingLimit | 10 ppm （n=2） | |
| ColorChange | White → PalePink | |
| ReactionPrinciple | CH2:Cl2 + CrO3 + H2S2O7 → Cl2 | |
| Coefficient ofVariation | 15% （for 50 to 100ppm）, 10% （for 100 to 500 ppm） | |
| ShelfLife | 3Years | |
| 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 |
| Cl2, Br2, I2 | - | Plus error | Discolors palepink |
| Unsaturatedhalogenated HCs | - | Plus error | Discolors palepink |
| Saturatedhalogenated HCs | - | Plus error | Discolors palepink |
| Othersubstance measurable with this detector tube |
| Substance | CorrectionFactor | PumpStrokes | MeasuringRange |
| Ethyl Chloride | 0.3 | 1 | 15 to 150ppm |
| Calibration gasgeneration | Diffusion tubemethod | |
| TLV-TWA | TLV-STEL | Explosive range |
| 50ppm | - | 15.5 to 66.9% |
