| Mercaptans | R-SH | NO.70 | |
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| Performance |
|
Measuring Range |
0.5 to 5 ppm |
5 to 120 ppm |
|
Number of Pump Strokes |
2 to 10 |
1 |
|
Correction Factor |
1/2 to 1/10 |
1 |
|
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 |
Mercaptans react with Palladium sulfate to produce Yellow stain |
|
| 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 color by itself |
|
Carbon monoxide |
2000 ppm |
Plus error |
Pale brown for whole layer |
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Hydrogen sulfide |
500 ppm |
Plus error |
No discoloration |
|
Acetylene, Ethylene |
2000 ppm |
Plus error |
Pale brown for whole layer |
| Other substance measurable with this detector tube |
|
Substance |
Correction Factor |
Pump Strokes |
Measuring Range |
|
Eutyl mercaptan |
1.0 |
1 or 2 to 10 |
0.5 to 120 ppm |
|
Isopropyl mercaptan |
2.0 |
1 |
10 to 240 ppm |
| Metyl mercaptan | 1.0 | 1 or 2 to 10 |
0.5 to 120 ppm |
| Propy mercaptan | 4.5 | 1 |
22.5 to 540 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. |
Yellow