| Benzene | C6H6 | NO.121L | |
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| Performance |
|
Measuring Range |
0.125 to 0.25 ppm |
0.25 to 12 ppm |
12 to 60 ppm |
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Number of Pump Strokes |
10 |
5 |
1 |
|
Correction Factor |
1/2 |
1 |
5 |
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Sampling Time |
3 minutes per pump stroke |
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Detecting Limit |
0.1ppm (n=10) |
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Color Change |
White |
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Reaction Principle |
Benzene reduces iodine pentoxide to liberate iodine, |
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| Coefficient of Variation | 10% (for 0.25 to 4 ppm), 5% (for 4 to 12 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) |
|
Substance |
Concentration |
Interference |
Change color by itself |
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Aromatic HCs |
- |
Plus error |
Produce brownish gray stain |
| Other substance measurable with this detector tube |
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Substance |
Correction Factor |
Pump Strokes |
Measuring Range |
|
Methylene Iodide |
1.67 |
5 |
0.4 to 20 ppm |
|
Methyl Iodide |
2.8 |
5 |
0.7 to 33.6 ppm |
| Calibration gas generation | Diffusion tube method | |
| TLV-TWA | TLV-STEL | Explosive range |
| 0.5ppm | 2.5ppm | 1.3 to 7.1% |
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| Copyright(c) 2001 GASTEC CORPORATION. All rights reserved. |
Brownish gray