| Nitric acid | HNO3 | NO.15L | |
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| Performance |
|
Measuring Range |
0.1 to 1 ppm |
1 to 20 ppm |
20 to 40 ppm |
|
Number of Pump Strokes |
2 to 10 |
1 |
1/2 |
|
Correction Factor |
1/2 to 1/10 |
1 |
2 |
|
Sampling Time |
45 seconds per pump stroke |
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|
Detecting Limit |
0.05 ppm (n=10) |
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Color Change |
Yellow |
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|
Reaction Principle |
Nitric acid reacts with indicator to produce purple stain. |
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| Coefficient of Variation | 15% (for 1 to 5 ppm), 10% (for 5 to 20 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 |
|
Hydrogen chloride |
1/10 time |
Plus error |
Produces reddish purple stain |
|
Chlorine |
- |
No effect |
Bleach the discoloration |
|
Carbon monoxide |
- |
No effect |
No discoloration |
|
Nitrogen dioxide |
- |
No effect |
No discoloration |
|
Organic solvents |
- |
No effect |
No discoloration |
| Other substance measurable with this detector tube |
|
Substance |
Correction |
Pump Strokes |
Measuring Range |
|
Hydrogen bromide |
0.8 |
1 |
0.8 to 16 ppm |
|
Trichloroacetic acid |
by scale |
1 |
1 to 37.5 ppm |
| Calibration gas generation | High pressure gas cylinder method | |
| TLV-TWA | TLV-STEL | Explosive range |
| 2ppm | 4ppm | - |
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| Copyright(c) 2001 GASTEC CORPORATION. All rights reserved. |
Purple
Chemical reaction product