| Sulfuric acid | H2SO4 | NO.35 | |
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| Performance |
|
Measuring Range |
0.5 to 5 mg/m3 |
|
Number of Pump Strokes |
5 |
|
Correction Factor |
1 |
|
Sampling Time |
25 seconds per pump stroke |
|
Detecting Limit |
0.2 mg/m3(n=5) |
|
Color Change |
Pale yellow |
|
Reaction Formula |
Sulfuric acid react with reagent to produce reddish purple stain. |
| Coefficient of Variation | 10% (for 0.5 to 1 mg/m3), 5% (for 1 to 5 mg/m3) |
| Shelf Life | 2 Years |
| Corrections for temperature & humidity |
Temperature 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 |
0.05ppm or higher |
Plus error |
Discolors to reddish purple |
|
Chlorine |
0.8ppm or higher |
Plus error |
Discolors to reddish purple |
|
Sulfur dioxide |
- |
No effect |
No discoloration |
|
Nitrogen dioxide |
1ppm or higher |
Plus error |
Discolors to reddish purple |
|
Hydrogen fluoride |
0.1ppm or higher |
Plus error |
Discolors to reddish purple |
| Calibration gas generation | Vaper pressure method | |
| TLV-TWA | TLV-STEL | Explosive range |
| 1mg/m3 | - | - |
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| Copyright(c) 2002 GASTEC CORPORATION. All rights reserved. |
Reddish purple