Nitric Acid Detection Tubes (0.1 to 40 ppm)
Measures Nitric Acid with a measuring range of 0.1 to 40 ppm
- 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: 30 seconds per pump stroke
- Detecting Limit: 0.05 ppm (10 pump strokes)
- Color Change: Yellow → Reddish purple
- Corrections for temperature & humidity: Humidity correction is necessary
- Reaction Principle: HNO3 + Indicator → Reaction product
- Relative Standard Deviation: 15% (for 1 to 5 ppm), 10% (for 5 to 20 ppm)
- Store the tubes at cool and dark place.
Possible coexisting substances and their interferences:
| Substance |
Concentration |
Interference |
Changes color by itself to |
| Hydrogen chloride |
≧ 1/10 |
+ |
Reddish purple |
| Chlorine |
|
No |
Bleaches |
| Carbon monoxide |
|
No |
No |
| Nitrogen dioxide |
|
No |
No |
| Organic solvents |
|
No |
No |
Other substance measurable with this detector tube
| Substance: |
Correction Factor: |
No. of Pump Strokes: |
Measuring Range: |
| Hydrogen bromide |
0.8 |
1 |
0.8 to 16 ppm |
| Trichloroacetic acid |
by scale |
1 |
1 to 37.5 ppm |
Nitric Acid Detection Tubes (0.1 to 40 ppm)
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