| Aniline | C6H5NH2 | NO.181 | |
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| Performance |
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Measuring Range |
1.25 to 2.5 ppm |
2.5 to 30 ppm |
30 to 60 ppm |
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Number of Pump Strokes |
5 |
3 |
2 |
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Correction Factor |
1/2 |
1 |
2 |
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Sampling Time |
3 minutes per pump stroke |
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Detecting Limit |
0.25 ppm (n=5) |
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Color Change |
Pale yellow |
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Reaction Principle |
Aniline reduces sodium dichromate to form phosphate, which is pale green in color. |
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| Coefficient of Variation | 10% (for 2.5 to 10 ppm), 5% (for 10 to 30 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) |
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Substance |
Concentration |
Interference |
Change color by itself |
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Ammonia |
1/10 time |
Plus error |
No discoloration |
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Amines |
1/10 time |
Plus error |
No discoloration |
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Aromatic amines |
- |
Plus error |
Produce pale green discoloraiton |
| Other substance measurable with this detector tube |
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Substance |
Correction |
No. of pump strokes |
Measuring range |
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N-methylaniline |
Factor:1.4 |
2 |
3.5 to 42 ppm |
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N,N-Dimethylaniline |
Factor:1.0 |
3 |
2.5 to 30 ppm |
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o-Toluidine |
Factor: 2.0 |
2 |
5 to 60 ppm |
| Calibration gas generation | Diffusion tube method | |
| TLV-TWA | TLV-STEL | Explosive range |
| 2ppm | - | 1.3 to 11% |
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| Copyright(c) 2001 GASTEC CORPORATION. All rights reserved. |
Pale green