简单介绍： 干洗溶剂汽油检测管128 stoddard solvent，measuring range 50 to 8000 mg/m3 number of pump strokes 1 correction factor 1 sampling，干洗溶剂汽油检测管仪价格，干洗溶剂汽油检测管128 stoddard solvent
干洗溶剂汽油检测管128 stoddard solvent 产品详情
详情介绍：
干洗溶剂汽油检测管128 stoddard solvent
stoddard solvent 28 performance
measuring range
50 to 8000 mg/m3
number of pump strokes
1
correction factor
1
sampling time
1.5 minutes per pump stroke
detecting limit
5 mg/m3 (n=1)
color change
white → brown (ring)
reaction principle
stoddard solvent + i2o5 + h2s2o7 → i2
coefficient of variation 15% (for 50`300 mg/m3), 10% (for 300`8000 mg/m3)
shelf life 3 years
corrections for
temperature & humidity unnecessary
store the tubes at cool and dark place.
possible coexisting substances and their interferences (note)
substance
concentration
result
change color by itself
carbon monoxide
0.1%
plus error
pale brown (whole layer)
acetylene, hexane, ethylene
0.2%
no effect
pale brown (whole layer)
alcohols, ketones,esters
- plus error
pale brown (whole layer)
aromatic hydrocarbons
- plus error
dark green
other substance measurable with this detector tube
calibration gas generation vaper pressure method
tlv-twa tlv-stel explosive range
100 mg/m3 - 0.8 % or higher