Phosphine |
NO.7L |
| PH3 |  |
 |
Performance
| Measuring Range |
|
||
| Number of Pump Strokes |
|
||
| Correction Factor |
|
||
| Sampling Time | 1 minute per pump stroke | ||
| Detecting Limit | 0.04 ppm (n = 10) | ||
| Colour Change | Pale yellow → Purple | ||
| Reaction Principle | PH3 + Gold- compound → Colloidal gold | ||
| Coefficient of Variation | 10% (for 0.3 to 1 ppm), 5% (for 1 to 5 ppm) | ||
| Shelf Life | 3 Years | ||
| Corrections for temperature & humidity | Unnecessary | ||
| Store the tubes at cool and dark place. | |||
Possible coexisting substances and their interferences (NOTE)
| Substance | Concentration | Interference | Change colour by itself to |
| Arsine | + | Purple | |
| Germane | + | Purple | |
| Hydrogen selenide | + | Purple | |
| Hydrogen sulphide | + | Purple |
| Calibration gas generation | High pressure gas cylinder method |
| TLV-TWA | TLV-STEL | Explosive range |
| 0.3 ppm | 1 ppm | - |
