Ethylene oxide |
NO.163LL |
| C2H4O |  |
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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 | 1.5 minutes per pump stroke | ||
| Detecting Limit | 0.05 ppm (n=4) | ||
| Colour Change | Yellow → Pale orange | ||
| Reaction Principle | C2H4O → 2HCHO 3HCHO + (NH2OH)3H3PO4 → H3PO4 H3PO4 + Base → Phosphate |
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| Coefficient of Variation | 15% (for 0.1 to 0.5 ppm), 10% (for 1 to 5 ppm) | ||
| Shelf Life | 1 Year | ||
| 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 colour by itself to |
| Acetaldehyde | 1.5ppm | + | Pale orange |
| Formaldehyde | 0.5ppm | + | Pale orange |
| Ketones | 15ppm | + | Pale orange |
| Alcohols | 300ppm |  |
No |
| Calibration gas generation | Permeation tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 1 ppm | - | 3.6 to 100% |
