| Carbon monoxide | CO | NO.1H |
|
|
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| Performance |
|
Measuring Range |
0.1 to 0.2% |
0.2 to 5.0% |
5.0 to10.0% |
|
Number of Pump Strokes |
2 |
1 |
1/2 |
|
Correction Factor |
1/2 |
1 |
2 |
|
Sampling Time |
1.5 minutes per pump stroke |
||
|
Detecting Limit |
0.02% (n=2) |
||
|
Color Change |
White |
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|
Reaction Principle |
Carbon monoxide reduces iodine pentoxide to liberate iodine, which is blackish brown. |
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| Coefficient of Variation | 10% (for 0.2 to 1.0 %), 5% (for 1.0 to 5.0 %) | ||
| 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 |
|
Acetylene |
0.3% |
Plus error |
Produce blackish brown stain. |
|
Olefins |
2/3 time |
Plus error |
Produce brown stain. |
|
Butane |
1% |
Plus error |
Produce pale brown for whole layer |
|
Propane |
20% |
Plus error |
No discoloration |
|
Hexane |
0.3% |
Plus error |
Produce pale brown for whole layer |
| Calibration gas generation | High pressure gas cylinder method | |
| TLV-TWA | TLV-STEL | Explosive range |
| 25ppm | - | 12.5 to 74% |
|
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| Copyright(c) 2001 GASTEC CORPORATION. All rights reserved. |
Blackish brown