Mercury vapour

 NO.40
Hg
Performance
Measuring Range
0.05 to 0.25 mg/m3 0.25 to 6.0 mg/m3 6.0 to 13.2 mg/m3
Number of Pump Strokes
5 1 1/2
Correction Factor
1/5 1 2.2
Sampling Time 1.5 minutes per pump stroke
Detecting Limit 0.01 mg/m3 (n=5)
Colour Change White → Pale Orange
Reaction Principle Hg + Cu2I2 → Cu2(HgI4) + 2Cu
Coefficient of Variation 10% (for 0.25 to 2 mg/m3), 5% (for 2 to 6 mg/m3)
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
Chlorine   + Pale orange
Nitrogen dioxide   + Pale orange
Hydrogen sulphide   + Pale orange (whole layer)
Calibration gas generation Vaper pressure method
TLV-TWA TLV-STEL Explosive range
0.025mg/m3 - -


Return to previous viewGo to top of page