Hydrogen Fluoride 0.25-100 ppm Detection Tubes
Performance
- Detecting Limit: 0.1 ppm (7 pump strokes)
- Color Change: Yellow to Brown (may produce "deep pink" color at higher concentration)
- Corrections for temperature and humidity: Humidity correction is necessary
- Relative Standard Deviation: 10% (for 0.5 to 5 ppm), 5% (for 5 to 20 ppm)
- Shelf Life: 3 years
- Reaction Principle: HF+ Indicator → Reaction Product
| Measuring Range: |
0.25 to 0.5 ppm |
0.5 to 20 ppm |
20 to 100 ppm |
| Number of Pump Strokes: |
7 (700 ml) |
4 (400 ml) |
1 (100ml) |
| Correction Factor: |
1/2 |
1 |
5 |
| Sampling Time: |
6 min |
3 min |
45 sec |
Possible coexisting substances and their interferences:
| Substance |
Concentration |
Interference |
Changes color by itself to |
| Chlorine |
≧ 1/10 |
+ |
Brown |
| Hydrogen chloride |
≧ 1/5 |
+ |
Brown |
| Nitric acid |
≧ 1/5 |
+ |
Brown |
| Nitrogen |
≧ 1/10 |
+ |
Brown |
Other substances measurable with this detector tube:
| Substance |
Correction Factor |
Pump Strokes |
Temperature |
Absolute Humidity |
Color Change |
| Fluorine |
2.5 |
1 |
20°C(68°F) |
9 mg/l |
Produces brown stain |
| 1.0 |
1 |
20°C(68°F) |
3 mg/l |
Produces a brown ring stain |
Hydrogen Fluoride 0.25-100 ppm Detection Tubes
Reaction Principle:
HF + Indicator → Reaction product
Possible coexisting substances and their interferences:
| Substance: |
Concentration: |
Interference: |
Changes Color by Itself to: |
| Chlorine |
≧ 1/10 |
＋ |
Brown |
| Hydrogen Chloride |
≧ 1/5 |
＋ |
Brown |
| Nitric Acid |
≧ 1/5 |
＋ |
Brown |
| Nitrogen Dioxide |
≧ 1/10 |
＋ |
Brown |
Other substance measurable with this detector tube:
| Substance: |
Fluorine |
Fluorine |
| Correction Factor: |
2.5 |
1.0 |
| Pump Strokes: |
1 |
1 |
| Temperature |
20°C（68°F) |
20°C（68°F) |
| Absolute Humidity |
9 mg/l |
3 mg/l |
| Color Change |
Produces brown stain |
Produces a brown ring stain |
Hydrogen Fluoride 0.25-100 ppm Detection Tubes
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