| Benzene | C6H6 | NO.121 | |
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| Performance |
|
Measuring Range |
2.5 to 5 ppm |
5 to 60 ppm |
60 to 120 ppm |
|
Number of Pump Strokes |
4 |
2 |
1 |
|
Correction Factor |
1/2 |
1 |
2 |
|
Sampling Time |
1.5 minutes per pump stroke |
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|
Detecting Limit |
0.5 ppm (n=4) |
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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 5 to 20 ppm), 5% (for 20 to 60 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 |
|
Esters |
2000 ppm |
Plus error |
No discoloration |
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Aromatic HCs |
- |
Plus error |
Produce dark green stain |
| Other substance measurable with this detector tube |
|
Substance |
Correction |
No. of Pump Strokes |
Measuring Range |
|
Diisobutylene |
Factor: 9 |
1 |
45 to 540 ppm |
|
|
Factor 19 |
3 |
95 to 1140 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. |
Dark Green
-pinene