Phosphine (PH3) Detection Tubes ( 0.15 to 5 ppm)
Gastec Detection Tube No. 7L measures Phosphine with a Range of 0.15 to 5 ppm.
- Measuring Range: 0.15 to 0.3 ppm, 0.3 to 5 ppm
- No. of Pump Strokes: 10, 5
- Correction Factor: 1/2, 1
- Sampling Time: 1 minute per pump stroke
- Detecting Limit: 0.04 ppm (10 pump strokes)
- Changes from Pale Yellow to Purple
- Corrections for temperature & humidity: Unnecessary
- Reaction Principle: PH3 + Gold-compound → Colloidal gold
- Relative Standard Deviation: 10% (for 0.3 to 1 ppm), 5% (for 1 to 5 ppm)
- 3 Year Shelf Life
- Store the tubes at cool and dark place.
Possible coexisting substances and their interferences:
| Substance |
Interference |
Changes color by itself to |
| Arsine |
+ |
Purple |
| Germane |
+ |
Purple |
| Hydrogen selenide |
+ |
Purple |
| Hydrogen sulfide |
+ |
Purple |
Phosphine (PH3) Detection Tubes ( 0.15 to 5 ppm)
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