简单介绍： 丙烯腈气体检测管191l acrylonitrile ch2:chcn，measuring range 0.1 to 0.2ppm 0.2 to 6.0 ppm 6.0 to 18.0 ppm number of pump stroke 4 2 1 correction factor，丙烯腈气体检测管价格
丙烯腈气体检测管191l acrylonitrile 产品详情
详情介绍：
丙烯腈气体检测管191l acrylonitrile
acrylonitrile91lch2:chcn
performance
measuringrange
0.1 to 0.2ppm
0.2 to 6.0 ppm
6.0 to 18.0ppm
number of pumpstroke
4
2
1
correctionfactor
1/2
1
3
sampling time
3 minutes per pumpstroke
detecting limit
0.05 ppm (n=4)
color change
yellow → pink
reaction principle
pretreatmenttube: ch2:chcn + cr6+ +h2so4 →hcn
detector tube : 2hcn +hgcl2 → 2hcl + hg(cn)2
hcl + base → chloride
coefficient ofvariation 10% (for 0.25 to 1ppm), 5% (for 1 to 6 ppm)
shelflife 3years
correctionsfor
temperature & humidity unnecessary
store the tubes at cool and darkplace.
possible coexisting substances and theirinterferences (note)
substance
concentration
interference
change color by itself
hydrogenchloride
- no effect
nodiscoloration
hydrogencyanide
- no effect
nodiscoloration
nitriles(c3)
- plus error
discolor pinkstain
acetonecyanohidrin
- plus error
discolor pinkstain
alcohols, esters,ketones
- no effect
nodiscoloration
aromatichydrocarbons
- no effect
nodiscoloration
othersubstance measurable with this detector tube
substance
correctionfactor
no. of pumpstrokes
measuringrange
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 7.2ppm
3-pentenenitrile
2.0
2
0.4 to 12ppm
calibration gasgeneration diffusion tubemethod
tlv-twa tlv-stel explosive range
2ppm - 3 to17%