Ethanol |
NO.112D |
| C2H5OH |
 |
Performance
| Measuring Range | 100 to 25000 ppm |
| Sampling Hours | 1 to 10 hours |
| Detecting Limit | 0.05 ppm (10 hours) |
| Colour Change | Yellow → Brown |
| Reaction Principle | C2H5OH + Cr6++ H2SO4 → Cr3+ |
| Coefficient of Variation | 15% (for 1000 to 3000 ppm-hr), 10% (for 3000 to 25000 ppm-hr) |
| Shelf Life | 3 Years |
| Corrections for temperature & humidity | Unnecessary |
| Store the tubes at cool and dark place. | |
Possible coexisting substances and their interferences (NOTE)
| Substance | Concentration | Interference | Change colour by itself to |
| Methanol,Esters | No | No | |
| Isopropyl alcohol | 1/1 | + | Brown |
| Calibration gas generation | Static gas dilution method |
| TLV-TWA | TLV-STEL | Explosive range |
| 1000 ppm | - | 3.3 to 19% |