简单介绍： *检测管134l ccl4，*检测管134l ccl4 carbon tetrachloride，measuring range 0.25 to 5 ppm 5 to 12 ppm number of pump strokes 2 1 correction factor 1 2.4 sampling，*......
*检测管134l ccl4 产品详情
详情介绍：
*检测管134l ccl4 carbon tetrachloride34lccl4performance
measuring range
0.25 to 5 ppm
5 to 12 ppm
number of pumpstrokes
2
1
correctionfactor
1
2.4
sampling time
2 minutes per pumpstroke
detecting limit
0.05 ppm (n=2)
color change
white → yellow
reaction principle
ccl4 + i2o5 + h2s2o7 → cocl2
cocl2 +(ch3)2nc6 h4cho→ (ch3)2nc6 h4cl2 + co2
(ch3)2nc6h4cl2 + (c6h5)2nh4 (white) → reaction product (yellow)
coefficient ofvariation 10% (for 0.25 to 1 ppm), 5% (for 2 to 5 ppm)
shelflife 1year
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
hydrogen chloride
- none
nodiscoloration
chlorine, bromine
5 ppm
plus error
produce yellowstain
methyl bromide
20ppm
plus error
yellow
1,1,1-trichloroethane
20 ppm
plus error
yellow
calibration gasgeneration diffusion tubemethod
tlv-twa tlv-stel explosive range
5ppm 10ppm -