| Hydrogen sulfide | H2S | NO.4HH | |
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| Performance |
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Measuring Range |
0.1 to 2.0% |
2.0 to 4.0% |
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Number of Pump Strokes |
1 |
1/2 |
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Correction Factor |
1 |
2 |
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Sampling Time |
45 seconds per pump stroke |
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Detecting Limit |
0.01% (n=1) |
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Color Change |
Pale Blue |
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Reaction Principle |
Hydrogen sulfide reacts with cupric sulfate to form |
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| Coefficient of Variation | 10% (for 0.1 to 0.6 %), 5% (for 0.6 to 2 %) | ||
| Shelf Life | 3 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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Ammonia |
- |
Produces blackish brown |
Produce dark blue stain |
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Sulfur dioxide |
0.5% |
Minus error |
No discoloration |
|
Mercaptans |
1 % |
Plus error |
No discoloration |
| Calibration gas generation | High pressure gas cylinder method | |
| TLV-TWA | TLV-STEL | Explosive range |
| 10ppm | 15ppm | 4.0 to 44% |
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| Copyright(c) 2001 GASTEC CORPORATION. All rights reserved. |
Blackish Brown