简单介绍： *气体检测管12l hydrogen cyanide hcn，measuring range 0.36 to1.25 ppm 1.25 to2.5 ppm 2.5 to 60 ppm 60 to120 ppm number of pump strokes 5 2 1 1/2 correction factor，*......
*气体检测管12l hydrogen cyanide 产品详情
详情介绍：
*气体检测管12l hydrogen cyanide
hydrogen cyanide 2lch3coch3
performance
measuringrange
0.36 to1.25ppm
1.25 to2.5 ppm
2.5 to 60 ppm
60 to120 ppm
number of pump strokes
5
2
1
1/2
correctionfactor
1/7
1/2
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
1.15
1
2.88 to 69 ppm
boron trichloride
by scale
2
0.5 to 20ppm
calibration gasgeneration diffusion tubemethod
tlv-twa tlv-stel explosive range
- c 4.7ppm 5.6to 40%