Gastec 7 快速膦检测管PH3(2.5~100ppm)

Indicator: 5 to 50 ppm
Measuring Range: 
+ 2.5 to 5 ppm, Number of Pump Strokes 4
+ 5 to 50 ppm, Number of Pump Strokes 2
+ 50 to 100 ppm, Number of Pump Strokes 1
Sampling Time:  1.5 minutes per pump stroke
Colour Change: White → Pale yellow
Reaction Principle: 2PH3 + 6HgCl2 + 3H2O → Hg3P2 3HgCl23H2O+6HCl
Coefficient of Variation: 10% (for 5 to 10 ppm), 5% (for 10 to 50 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Performance
Measuring Range
2.5 to 5 ppm 5 to 50 ppm 50 to 100 ppm
Number of Pump Strokes
4 2 1
Correction Factor
1/2 1 2
Sampling Time 1.5 minutes per pump stroke
Detecting Limit 0.5 ppm (n = 4)
Colour Change White → Pale yellow
Reaction Principle 2PH3 + 6HgCl2 + 3H2O → Hg3P2 3HgCl23H2O+6HCl
Coefficient of Variation 10% (for 5 to 10 ppm), 5% (for 10 to 50 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 20 ppm + Brown
Hydrogen selenide 20 ppm + Brown
Hydrogen sulphide 10 ppm + Dark brown
Calibration gas generation High pressure gas cylinder method
TLV-TWA TLV-STEL Explosive range
0.3 ppm 1 ppm -

 

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