甲醛检测管91M HCHO Formaldehyde
- 型号：91M
- 产地：其它
- 供应商：上海仪在机电科技有限公司
- 供应商报价：电议
- 标签：甲醛检测管91M HCHO Formaldehyde,分析仪器,元素分析仪,供应甲醛检测管91M HCHO Formaldehyde,上海仪在机电科技有限公司
产品库
| Performance |
| Measuring Range | 8 to 20ppm | 20 to 2000ppm | 2000 to 6400ppm |
| Number of Pump Strokes | 2 | 1 | 1/2 |
| Correction Factor | 0.4 | 1 | 3.2 |
| Sampling Time | 1.5 minutes per pump stroke | ||
| Detecting Limit | 4 ppm （n=2） | ||
| Color Change | Yellow → Red | ||
| Reaction Principle | 3HCHO + （NH2OH）3H3PO4 → H3PO4 | ||
| Coefficient of Variation | 10% （for 8 to 200 ppm）, 5% （for 500 to 2000 ppm） | ||
| Shelf Life | 2 Years | ||
| Corrections for temperature & humidity | Temperature correction is necessary | ||
| Store the tubes in the refrigerator to keep at 10oC （50oF） or below. | |||
| Possible coexisting substances ａnd their interferences | （NOTE） |
| Substance | Concentration | Interference | Change color by itself |
| Acrolein | 5 times | Plus error | Produces red stain at 20 ppm |
| Acetaldehyde | 1/6 time | Plus error | Produces red stain at 3 ppm |
| Other substance measurable with this detector tube |
| Calibration gas generation | Diffusion tube method | |
| TLV-TWA | TLV-STEL | Explosive range |
| - | C 0.3ppm | 7.0 to 73% |
