Gastec 191L 有机气体检测管; 丙烯腈 CH2:CHCN(0.1~18ppm)

Indicator: 0.2 to 6.0 ppm
Measuring Range: 
+ 0.1 to 0.2 ppm, Number of Pump Strokes 4
+ 0.2 to 6.0 ppm, Number of Pump Strokes 2
+ 6.0 to 18.0 ppm, Number of Pump Strokes 1
Sampling Time: 2 minute per pump stroke
Colour Change: Yellow → Pink
Reaction Principle: 
+ Pretreatment tube: CH2:CHCN + Cr6+ + H2SO4 → HCN
+ Detector tube : 2HCN + HgCl2 → 2HCl + Hg(CN)2
+ HCl + Base → Chloride
Coefficient of Variation: 10% (for 0.2 to 2.0 ppm), 5% (for 2.0 to 6.0 ppm)
Nr. of tests: 5
Pump: GV-100S/110S

Detail

Catalog

Manual

Manual tube

Performance
Measuring Range
0.1 to 0.2 ppm 0.2 to 6.0 ppm 6.0 to 18.0 ppm
Number of Pump Strokes
4 2 1
Correction Factor
1/2 1 3
Sampling Time 2 minutes per pump stroke
Detecting Limit 0.05 ppm (n=4)
Colour Change Yellow → Pink
Reaction Principle Pretreatment tube: CH2:CHCN + Cr6+ + H2SO4 → HCN
Detector tube : 2HCN + HgCl2 → 2HCl + Hg(CN)2
HCl + Base → Chloride
Coefficient of Variation 10% (for 0.2 to 2.0 ppm), 5% (for 2.0 to 6.0 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
Hydrogen chloride   No No
Hydrogen cyanide   No No
Nitriles (C3)   + Pink
Acetone cyanohidrin   + Pink
Alcohols, Esters, Ketones   No No
Aromatic hydrocarbons   No No
Other substance measurable with this detector tube
Substance Correction Factor No. of pump strokes Measuring Range
n-Butyronitrile 30 1 6 to 180 ppm
2-Methyl-3-butenenitrile 2.0 2 0.4 to 12 ppm
2-Pentenenitrile 1.2 2 0.24 to 7.2 ppm
3-Pentenenitrile 2.0 2 0.4 to 12 ppm
Calibration gas generation Diffusion tube method
TLV-TWA TLV-STEL Explosive range
2 ppm(2014) - 3 to 17%
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