| Ethylene | CH2:CH2 | NO.172L | |
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| Performance |
|
Measuring Range |
0.2 to 50 ppm |
|
Number of Pump Strokes |
4 |
|
Correction Factor |
1 |
|
Sampling Time |
2 minutes per pump stroke |
|
Detecting Limit |
0.05 ppm (n=4) |
|
Color Change |
Pale yellow |
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Reaction Principle |
Ethylene reacts with palladium sulfate and ammonium molybdate |
| Coefficient of Variation | 10% (for 0.2 to 10 ppm), 5% (for 10 to 50 ppm) |
| 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 |
|
Ammonia, Hydrogen cyanide |
- |
Plus error |
Discolor to white |
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Carbon monoxide, Hydrogen |
- |
Plus error |
Discolor to blue for whole layer |
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Hydrogen chloride |
- |
Plus error |
Discolors to pink |
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Hydrogen sulfide |
- |
Plus error |
Discolors to black |
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Butadiene |
- |
Plus error |
Discolors to white |
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Butane, Pentane |
- |
Plus error |
Discolor to blue for whole layer |
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Butylene, Propylene |
1/4 time |
Plus error |
Discolor to blue |
| Calibration gas generation | High pressure gas cylinder method | |
| TLV-TWA | TLV-STEL | Explosive range |
| - | - | 2.7 to 36% |
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| Copyright(c) 2001 GASTEC CORPORATION. All rights reserved. |
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