Phosphine (PH3) Detection Tubes (2.5 to 1000 ppm)
Gastec Detection Tube No. 7J measures Phosphine with a Range of 2.5 to 1000 ppm.
- Measuring Range:
- 2.5 to 25 ppm
- (25) to 500 ppm
- 500 to 1000 ppm
- Number of Pump Strokes: 2 to 10, 1, 1/2
- Correction Factor: 1/2 to 1/10, 1, 2
- Sampling Time: 1 minute per pump stroke
- Detecting Limit: 1 ppm (10 pump strokes)
- Changes from White to Pale Yellow
- Corretions for temperature & humidity: Unnecessary
- Reaction Principle: 2PH3 + 6HgCl2 + 3H2O → Hg3P2･3HgCl2･3H2O + 6HCl
- Relative Standard Deviation: 10% (for 2.5 to 100 ppm), 5% (for 100 to 500 ppm)
- 3 Year Shelf Life
- Store the tubes at cool and dark place.
Possible coexisting substances and their interferences:
| Substance |
Concentration |
Interference |
Changes color by itself to |
| Hydrogen sulfide |
≧ 1/5 |
+ |
Blackish brown |
| Arsine |
≧ 1/3 |
+ |
Brown |
| Hydrogen selenide |
≧ 1/5 |
+ |
Brown |
Phosphine (PH3) Detection Tubes (2.5 to 1000 ppm)
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