简单介绍： 苯胺气体检测管181 aniline c6h5nh2，measuring range 1.25 to 2.5 ppm 2.5 to 30 ppm 30 to 60 ppm number of pump strokes 5 3 2 correction factor 1/2 1 2 sampling time 3 minu......
苯胺气体检测管181 aniline c6h5nh2 产品详情
详情介绍：
苯胺气体检测管181 aniline c6h5nh2
aniline 81c6h5nh2performance
measuringrange
1.25 to 2.5ppm
2.5 to 30 ppm
30 to 60 ppm
number of pumpstrokes
5
3
2
correctionfactor
1/2
1
2
samplingtime
3 minutes per pumpstroke
detectinglimit
0.25 ppm (n=5)
colorchange
pale yellow → palegreen
reactionprinciple
c6h5nh2 + cr6+ → cr3+
coefficient ofvariation 10% (for2.5 to 10 ppm), 5% (for 10 to 30 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
ammonia
1/10 time
plus error
no discoloration
amines
1/10 time
plus error
no discoloration
aromaticamines
- plus error
produce pale greendiscoloraiton
othersubstance measurable with this detector tube
substance
correction
no. of pump strokes
measuring range
n-methylaniline
factor:1.4
2
3.5 to 42 ppm
n,n-dimethylaniline
factor:1.0
3
2.5 to 30 ppm
o-toluidine
factor: 2.0
2
5 to 60ppm
calibration gasgeneration diffusion tubemethod
tlv-twa tlv-stel explosive range
2ppm - 1.3 to 11%