1,3-丁二烯气体检测管174ll 产品详情
详情介绍：
1,3-丁二烯气体检测管174ll 1,3-butadiene 74llch2:chch:ch2performance
measuring range
0.5 to 5 ppm
number of pump strokes
1
correction factor
1
sampling time
3 minutes per pumpstroke
detecting limit
0.1 ppm (n=1)
color change
pink → paleyellow
reaction principle
ch2:chch:ch2+kmno4 → reaction product
coefficient ofvariation 10% (for 0.05to 1 ppm-hr),5% (for 2 to 5 ppm-hr)
shelflife 3 years
correctionsfor
temperature & humidity unnecessary
store the tubes inthe refrigerator to keep at 10oc (50of) orbelow.
possible coexisting substances and theirinterferences (note)
substance
concentration
interference
change color by itself
ammonia
- no effect
nodiscoloration
co &co2
- no effect
nodiscoloration
h2s,hcn
- no effect
nodiscoloration
acetylene
50 ppmr
plus error
discolors towhite
olefins
- plus error
discolors paleyellow
calibration gasgeneration diffusion tubemethod
tlv-twa tlv-stel explosive range
2ppm - 2.0 to 12%