| Methyl mercaptan | CH3SH | NO.71H |
|
|
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| Performance |
|
Measuring Range |
20 to 50 ppm |
50 to 1000 ppm |
1000 to 2700 ppm |
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|
Number of Pump Strokes |
2 |
1 |
1/2 |
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|
Correction Factor |
0.4 |
1 |
2.7 |
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|
Sampling Time |
1 minute per pump stroke |
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|
Detecting Limit |
2 ppm (n=2) | ||||
|
Color Change |
White |
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|
Reaction Principle |
2CH3SH +PdSO4 |
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| Coefficient of Variation |
10% (for 50 to 200 ppm), 5% (for 200 to 1000 ppm) |
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| Shelf Life | 3 Years | ||||
| Corrections for temperature & humidity |
Unnecessary | ||||
| Store the tubes at cool and dark place. | |||||
| Possible coexisting substances and their interferences | (NOTE) |
|
Substance |
Concentration |
Interference |
Change color by itself |
|
Carbon monoxide |
- |
No effect |
No discoloration |
|
Nitrogen dioxide |
- |
No effect |
No discoloration |
|
Hydrogen sulfide |
1000 ppm |
Plus error |
No discoloration |
|
Ethylene |
- |
No effect |
No discoloration |
|
Mercaptans |
- |
Plus error |
Discolors yellow stain |
| Other substance measurable with this detector tube |
|
Substance |
Correction Factor |
Pump Strokes |
Measuring Range |
|
Ethyl mercaptan |
by scale |
1 |
100 to 3800ppm |
| Calibration gas generation | Static gas dilution method | |
| TLV-TWA | TLV-STEL | Explosive range |
| 0.5ppm | - | 3.9 to 21.8% |
|
|
| Copyright(c) 2001 GASTEC CORPORATION. All rights reserved. |
Yellow
(CH3S)2 Pd+ H2SO4