简单介绍： *气体检测管12ll hydrogen cyanide，measuring range 0.2 to 7 ppm number of pump strokes 2 correction factor 1 sampling time 2 minutes per pump stroke detecting limit 0......
*气体检测管12ll hydrogen cyanide 产品详情
详情介绍：
*气体检测管12ll hydrogen cyanide hydrogen cyanide 2ll hcnperformance
measuring range
0.2 to 7 ppm
number of pump strokes
2
correction factor
1
sampling time
2 minutes per pump stroke
detecting limit
0.05 ppm (n=2)
color change
yellow → pink
reaction principle
2hcn + hgcl2 → hg(cn)2 + 2hcl
hcl + base → chloride product
coefficient of variation 10% (for 0.2 to 2 ppm), 5% (for 3 to 7 ppm)
shelf life 2 years
corrections for
temperature & humidity humidity correction is necessary
store the tubes at cool and dark place.
possible coexisting substances and their interferences (note)
substance
concentration
interference
change color by itself
hydrogen sulfide
1 ppm
plus error
red discoloration
sulfur dioxide
1 ppm
plus error
red discoloration
other substance measurable with this detector tube
calibration gas generation permeation tube method
tlv-twa tlv-stel explosive range
- c 4.7 ppm 5.6 to 40%