Phosphine |
NO.7J |
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Measuring Range |
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Number of Pump Strokes |
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Correction Factor |
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Sampling Time | 1 minute per pump stroke | |||
Detecting Limit | 1 ppm (n = 10) | |||
Colour Change | White → Pale yellow | |||
Reaction Principle | 2PH3 + 6HgCl2 + 3H2O → Hg3P2![]() ![]() |
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Coefficient of Variation | 10% (for 2.5 to 100 ppm), 5% (for 100 to 500 ppm) | |||
Shelf Life | 3 Years | |||
Corrections for temperature & humidity | Unnecessary | |||
Store the tubes at cool and dark place. |
Substance | Concentration | Interference | Change colour by itself to |
Arsine | 1/3 time | + | Brown |
Hydrogen selenide | 1/5 time | + | Brown |
Hydrogen sulphide | 1/5 time | + | Dark brown |
Calibration gas generation | High pressure gas cylinder method |
TLV-TWA | TLV-STEL | Explosive range |
0.3 ppm | 1 ppm | - |