Isopropyl alcohol |
NO.113LL |
| CH3CH¡ÊOH¡ËCH3¡Êi-C3H7OH¡Ë |  |
 |
Performance
| Measuring Range |
|
||
| Number of Pump Strokes |
|
||
| Correction Factor |
|
||
| Sampling Time | 3 minutes per pump stroke | ||
| Detecting Limit | 5 ppm (n=2) | ||
| Colour Change | Pink → Pale blue | ||
| Reaction Principle | CH3CH(OH)CH3 + Cr6++ H2SO4 → Cr3+ | ||
| Coefficient of Variation | 15% (for 20 to 60 ppm), 10% (for 60 to 200 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 | + | Pale blue | |
| Esters,Ketones | No | No | |
| Aliphatic hydrocarbon | No | No | |
| Aromatic hydrocarbon | No | No |
Other substance measurable with this detector tube
| Substance | Correction Factor | No. of pump strokes | Measuring Range |
| Ethylene glycol MEE | 0.76 | 2 | 15.2 to 152 ppm |
| 1-Methoxy-2-propanol | 0.76 | 2 | 15.2 to 152 ppm |
| Propyl alcohol | 0.68 | 2 | 13.6 to 136 ppm |
| Ethylene glycol MBE | 1.15 | 2 | 23 to 230 ppm |
| Ethylene glycol MME | 1.0 | 2 | 20 to 200 ppm |
| Calibration gas generation | Diffusion tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 200 ppm | 400 ppm | 2 to 12.7% |
