| Mercaptans | R-SH | NO.70L | |
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| Performance |
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Measuring Range |
0.1 to 0.2 ppm |
0.2 to 0.5 ppm |
0.5 to 4 ppm |
4 to 8 ppm |
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Number of Pump Strokes |
4 |
2 |
1 |
1/2 |
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Correction Factor |
1/5 |
0.4 |
1 |
2 |
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Sampling Time |
1.5 minutes per pump stroke |
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Detecting Limit |
0.05 ppm (n=4) |
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Color Change |
Yellow |
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Reaction Principle |
Mercaptans react with Mercuric chloride to produce |
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| Coefficient of Variation | 10% (for 0.5 to 1 ppm), 5% (for 1 to 4 ppm) | |||
| Shelf Life | 2 Years | |||
| Corrections for temperature & humidity |
Unnecessary | |||
| 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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Acid gases |
- |
Plus error |
Produces red stain |
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Hydrogen sulfide |
 200ppm |
No effect |
No discoloration |
| Other substance measurable with this detector tube |
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Substance |
Correction Factor |
Pump Strokes |
Measuring Range |
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Butyl mercaptan |
1.6 |
1/2,1,2 or 4 |
0.16 to 12.8 ppm |
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tert-Butyl mercaptan |
1.0 |
0.1 to 8 ppm |
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| Euthyl mercaptan | 1.0 |
0.1 to 8 ppm |
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| Methyl mercaptan | 1.0 |
0.1 to 8 ppm |
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| Propy mercaptan | 1.2 |
0.12 to 9.6 ppm |
| Calibration gas generation | Permeation tube method | |
| TLV-TWA | TLV-STEL | Explosive range |
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| Copyright(c) 2001 GASTEC CORPORATION. All rights reserved. |
Red