| Hydrogen fluoride | HF | NO.17 |
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| Performance |
|
Measuring Range |
0.25 to 0.5ppm |
0.5 to 20 ppm |
20 to 100 ppm |
|
Number of Pump Strokes |
7 |
4 |
1 |
|
Correction Factor |
1/2 |
1 |
5 |
|
Sampling Time |
45 seconds per pump stroke |
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|
Detecting Limit |
0.1ppm (n=7) |
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Color Change |
Yellow |
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|
Reaction Principle |
Hydrogen fluoride reacts with indicator to produce brownish pink color. HF + Indicator |
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| Coefficient of Variation |
10% (for 0.5 to 5 ppm), 5% (for 5 to 20 ppm) |
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| Shelf Life | 3 Years | ||
| Corrections for temperature & humidity |
Humidity correction is necessary | ||
| Store the tubes at cool and dark place. | |||
| Possible coexisting substances and their interferences | (NOTE) |
|
Substance |
Concentration |
Interference |
Change color by itself |
|
Hydrogen chloride, Nitric acid |
1/5 time |
Plus error |
brownish pink stain |
|
Chlorine, Nitrogen dioxide |
1/10 time |
Plus error |
brownish pink stain |
| Other substance measurable with this detector tube |
|
Substance |
Correction Factor |
Pump Stroke |
Temperature |
Absolute Humidity |
Color Change |
|
Fluorine |
2.5 |
1 |
20oC (68oF) |
9 mg/l |
Produces brown stain |
|
1.0 |
1 |
20oC (68oF) |
3 mg/l |
| Calibration gas generation | Permeation tube method | |
| TLV-TWA | TLV-STEL | Explosive range |
| - | C 3ppm | - |
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| Copyright(c) 2001 GASTEC CORPORATION. All rights reserved. |
Brownish Pink
Chemical reaction compound