简单介绍： 丙烯腈气体检测管191 acrylonitrile ch2:chcn，measuring range 2 to 5 ppm 5 to 120 ppm 120 to 360 ppm number of pump stroke 4 2 1 correction factor 0.4 1 3 sampling time 1 ......
丙烯腈气体检测管191 acrylonitrile 产品详情
详情介绍：
丙烯腈气体检测管191 acrylonitrile
acrylonitrile91ch2:chcn
performance
measuringrange
2 to 5 ppm
5 to 120 ppm
120 to 360 ppm
number of pumpstroke
4
2
1
correctionfactor
0.4
1
3
sampling time
1 minute per pumpstroke
detecting limit
1 ppm (n=4)
color change
yellow → red
reaction principle
pretreatment tube:ch2:chcn + cr6+ +h2so4 →hcn
detector tube : 2hcn +hgcl2 → 2hcl + hg(cn)2
hcl + base → chloride
coefficient ofvariation 10% (for5 to 40 ppm), 5% (for 40 to 120 ppm)
shelflife 3years
correctionsfor
temperature & humidity temperature correction is necessary
store the tubes at cool and darkplace.
possible coexisting substances and theirinterferences (note)
substance
concentration
interference
change color by itself
nitriles (c3)
10ppm
plus error discolors redstain
acetonecyanohidrin
10ppm
plus error
discolors redstain
alcohols, esters,ketones
- - nodiscoloration
aromatichydrocarbons
- - nodiscoloration
hydrogenchloride,
hydrogen cyanide
-
- nodiscoloration
othersubstance measurable with this detector tube
substance
correction factor
pump strokes
measuring range
propionnitrile
1.0
4
50 to120%
calibration gasgeneration diffusion tubemethod
tlv-twa tlv-stel explosive range
2ppm - 3 to17%