简单介绍： 甲基丙烯酸乙酯检测管149，measuring range 10 to 200 ppm 200 to 500 ppm number of pump strokes 2 1 correction factor 1 2.5 sampling time 4 minutes，异丁烯酸甲酯检测管价格，甲基丙烯酸乙酯检测管149 c......
甲基丙烯酸乙酯检测管149 产品详情
详情介绍：
甲基丙烯酸乙酯检测管149 methyl metacrylate49ch2:c(ch3)co2ch3
performance
measuring range
10 to 200 ppm
200 to 500 ppm
number of pumpstrokes
2
1
correctionfactor
1
2.5
sampling time
4 minutes per pumpstroke
detecting limit
1 ppm (n=2)
color change
yellow → paleblue
reaction principle
ch2:c(ch3)co2ch3 + cr6+ + h2so4 → cr3+
coefficient ofvariation 10% (for 10 to 50ppm), 5% (for 50 to 200 ppm)
shelflife 2years
correctionsfor
temperature & humidity temperature correction is necessary
store the tubes at cool and darkplace.
possible coexisting substances and theirinterferences (note)
substance
concentration
interference
change color by itself
alcohols, esters,ketones
- plus error
produce pale bluediscoloration
othersubstance measurable with this detector tube
tube 149 reading(n=2)
10
20
30
50
100
150
200
allyl isothiocyanateconc. (ppm)
5
10
15
30
70
130
200
calibration gasgeneration diffusion tubemethod
tlv-twa tlv-stel explosive range
50ppm 100ppm 1.7 to8.2%