Phosphine

 NO.7LA
PH3
Performance
Measuring Range
0.05 to
0.1 ppm		 0.1 to
1.5 ppm		 1.5 to
2.5 ppm		 2.5 to
9.8 ppm
Number of Pump Strokes
10 5 3 1
Correction Factor
1/2 1 1.7 6.5
Sampling Time 1.5 minutes per pump stroke
Detecting Limit 0.02 ppm (n = 10)
Colour Change Yellow → Red
Reaction Principle PH3 +3HgCl2 → P(HgCl)3 + 3HCl
HCl + Base Chloride
Coefficient of Variation 10% (for 0.1 to 0.4 ppm), 5% (for 0.4 to 1.5 ppm)
Shelf Life 2 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 1/10 time + Red
Hydrogen chloride   No No
Diborane   No No
Calibration gas generation High pressure gas cylinder method
TLV-TWA TLV-STEL Explosive range
0.3 ppm 1 ppm -


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