Isopropyl alcohol |
NO.113 |
| CH3CHiOHjCH3ii-C3H7OHj |  |
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Performance
| Measuring Range |
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| Number of Pump Strokes |
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| Correction Factor |
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| Sampling Time | 3 minutes per pump stroke | |||
| Detecting Limit | 0.004% (n=2) | |||
| Colour Change | Pink → Pale Blue | |||
| Reaction Principle | (CH3)2CHOH + Cr6+ + H2SO4 →Cr3+ | |||
| Coefficient of Variation | 15% (for 0.04 to 0.5 %), 10% (for 0.5 to 2.5 %) | |||
| Shelf Life | 3 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 |
| Other alcohols | + | Pale blue | |
| Carbon dioxide | No | No | |
| Carbon monoxide | No | No |
Other substance measurable with this detector tube
| Substance | Correction Factor | No. of pump strokes | Measuring Range |
| Propyl alcohol | 1 | 1 | 0.04 to 2.5 ppm |
| Calibration gas generation | Diffusion tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 200 ppm | 400 ppm | 2 to 12.7% |
