| Ethyl mercaptan | C2H5SH | NO．72L | |
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| Performance |
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Measuring Range |
0.2 to 0.5 ppm |
0.5 to 30 ppm |
30 to 75 ppm |
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Number of Pump Strokes |
2 |
1 |
1/2 |
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Correction Factor |
0.4 |
1 |
2.5 |
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Sampling Time |
1.5 minutes per pump stroke |
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Detecting Limit |
0.15 ppm (n=2) |
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Color Change |
Yellow |
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Reaction Principle |
Ethyl mercaptan react with acid reagent to produce red stain. |
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| Coefficient of Variation | 10% (for 0.5 to 5 ppm), 5% (for 5 to 30 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) |
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Substance |
Concentration |
Interference |
Change color by itself |
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Hydrogen Sulfide |
- |
Plus error |
Produces red stain |
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Mercaptans |
- |
Plus error |
Produce red stain |
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Acetylene |
- |
No effect |
No discoloration |
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Carbon Monoxide |
- |
No effect |
No discoloration |
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Ethylene |
- |
No effect |
No discoloration |
| Calibration gas generation | Permeation tube method | |
| TLV-TWA | TLV-STEL | Explosive range |
| 10ppm | - | 2.8 to 18.2％ |
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| Copyright(c) 2001 GASTEC CORPORATION. All rights reserved. |
Red