| Acetic acid | CH3CO2H | NO.81 | |
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| Performance |
|
Measuring Range |
1 to 2 ppm |
2 to 50 ppm |
50 to 100 ppm |
|
Number of Pump Strokes |
2 |
1 |
1/2 |
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Correction Factor |
1/2 |
1 |
2 |
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Sampling Time |
1 minute per pump stroke |
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Detecting Limit |
0.2 ppm (n=2) |
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Color Change |
Pink |
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Reaction Principle |
Acetic acid neutralizes sodium hydroxide to discolor indicator to yellow. |
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| Coefficient of Variation | 10% (for 2 to 10ppm), 5% (for 10 to 50 ppm) | ||
| 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 |
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Hydrogen chloride, Hydrogen cyanide,Nitric acid |
3 times or higher |
Plus error |
Produce yellow stain |
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Chlorine, Sulfur dioxide, Nitrogen dioxide |
1/2 times or higher |
Plus error |
Produce yellow stain |
| Other substance measurable with this detector tube |
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Substance |
Correction |
No. of pump strokes |
Measuring range |
|
Acetic anhydride |
Factor: 0.3 |
1 |
0.6 to 15 ppm |
|
Acrylic acid |
Factor: 1.0 |
1 |
2 to 50 ppm |
|
Formic acid |
Factor: 2.6 |
1 |
5.2 to 130 ppm |
| Isovalenic acid | Factor: 1.0 | 1 | 2 to 50 ppm |
|
Maleic anhydride |
Factor: 0.4 |
1 |
0.8to 20 ppm |
|
Methacrylic acid |
Factor: 0.9 |
1 |
1.8to 45 ppm |
|
Propionic acid |
Factor: 1.5 |
1 |
3to 75 ppm |
| Calibration gas generation | Diffusion tube method | |
| TLV-TWA | TLV-STEL | Explosive range |
| 10ppm | 15ppm | - |
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| Copyright(c) 2001 GASTEC CORPORATION. All rights reserved. |
Yellow