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氰化氢气体检测管12L Hydrogen cyanide
Hydrogen cyanide No.12L
CH3COCH3
Performance
MeasuringRange
0.36 to1.25ppm
1.25 to2.5 ppm
2.5 to 60 ppm
60 to120 ppm
Number of Pum
1
2
SamplingTime
2 minutes per pumpstroke
DetectingLimit
0.1 ppm (n=5)
ColorChange
Yellow → Red
ReactionPrinciple
2HCN +HgCl2 → Hg(CN)2+ 2HCl
HCl + base → Chloride product
Coefficient ofVariation
10% (for 2.5 to 20ppm), 5% (for 20 to 60 ppm)
ShelfLife 2Years
Correctionsfor
temperature & humidity Humidity correction is necessary
Store the tubes at cool and darkplace.
Possible coexisting substances and theirinterferences (NOTE)
Substance
Concentration
Interference
Change color by itself
Sulfurdioxide
20 ppm
Plus error
Reddiscoloration
Hydrogensulfide
5 ppm
Plus error
Reddiscoloration
Othersubstance measurable with this detector tube
Substance
Correction Factor
Pump Strokes
Measuring Range
Acetone cyanohydrine
氰化氢气体检测管12L