Ethyl mercaptan |
NO.72 |
| C2H5SH |  |
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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 | 2 minutes per pump stroke | ||
| Detecting Limit | 0.2 ppm (n=10) | ||
| Colour Change | White → Yellow | ||
| Reaction Principle | 2C2H5SH + PdSO4 → (C2H5S)2Pd+ H2SO4 | ||
| Coefficient of Variation | 10% (for 5 to 40 ppm), 5% (for 40 to 120 ppm) | ||
| 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 |
| Acetylene, Ethylene | 2000 ppm | + | Pale brown (whole layer) |
| Carbon Monoxide | 2000 ppm | + | Pale brown (whole layer) |
| Other Mercaptans | + | Yellow | |
| Hydrogen sulphide | 500 ppm | No | No |
| Calibration gas generation | Diffusion tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 0.5 ppm | - | 2.8 to 18.2% |
