| Ethyl mercaptan | C2H5SH | NO.72 | |
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| Performance |
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Measuring Range |
0.5 to 5 ppm |
5 to 120 ppm |
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Number of Pump Strokes |
2 to 10 |
1 |
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Correction Factor |
1/2 to 1/10 |
1 |
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Sampling Time |
2 minutes per pump stroke |
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Detecting Limit |
0.2 ppm (n=10) |
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Color Change |
White |
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Reaction Principle |
Ethyl mercaptan included Acid reagent to produce to yellow |
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| Coefficient of Variation |
10% (for 5 to 40 ppm), 5% (for 40 to 120 ppm) |
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| 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) |
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Substance |
Concentration |
Interference |
Change color by itself |
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Acetylene, Ethylene |
2000 ppm |
Plus error |
Discolor pale brown to whole layer |
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Carbon Monoxide |
2000 ppm |
Plus error |
Discolor pale brown to whole layer |
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Other Mercaptans |
- |
Plus error |
Discolor yellow stain |
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Hydrogen Sulfide |
500 ppm |
Plus error |
No stain |
| Calibration gas generation | Diffusion tube method | |
| TLV-TWA | TLV-STEL | Explosive range |
| 0.5ppm | - | 2.8 to 18.2% |
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| Copyright(c) 2001 GASTEC CORPORATION. All rights reserved. |
Yellow