| Methyl bromide | CH3Br | NO.136H | |
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| Performance |
|
Measuring Range |
10 to 20ppm |
20 to 300ppm |
300 to 600ppm |
|
Number of Pump Stroke |
2 |
1 |
1/2 |
|
Correction Factor |
1/2 |
1 |
2 |
|
Sampling Time |
2 minutes per pump stroke |
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|
Detecting Limit |
4 ppm (n=2) |
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|
Color Change |
White |
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Reaction Principle |
Methyl bromide is oxidized by nascent oxygen to liberate bromine. |
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| Coefficient of Variation | 10% (for 20 to 100 ppm), 5% (for 100 to 300 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 |
|
Cl2, Br2, NOx |
- |
Plus error |
Produce yellow stain |
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Saturated halogenated HCs |
- |
Plus error |
Produce yellow stain |
| Other substance measurable with this detector tube |
|
Substance |
Correction Factor |
Pump Strokes |
Measuring Range |
|
Chlorobromomethane |
0.9 |
1 |
18 to 270 ppm |
|
1,2-Dibromoethane |
0.7 |
1 |
14 to 210 ppm |
|
n-Butyl Bromide |
1.2 |
1 |
24 to 360 ppm |
| Calibration gas generation | Permeation tube method | |
| TLV-TWA | TLV-STEL | Explosive range |
| 1ppm | - | 10 to 15% |
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| Copyright(c) 2001 GASTEC CORPORATION. All rights reserved. |
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