简单介绍： *检测管134carbon tetrachloride，*检测管价格，measuring range 0.5 to 2.5 ppm 2.5 to 60 ppm number of pump strokes 2 to 5 1 correction factor 1/2 to 1/5 1 sampling，四氯化......
*检测管134carbon tetrachloride 产品详情
详情介绍：
*检测管134carbon tetrachloride carbon tetrachloride34ccl4performance
measuringrange
0.5 to 2.5 ppm
2.5 to 60 ppm
number of pump strokes
2 to 5
1
correction factor
1/2 to 1/5
1
samplingtime
1.5 minutes per pumpstroke
detectinglimit
0.2 ppm (n=5)
colorchange
white → yellow
reactionprinciple
ccl4 + i2o5 + h2s2o7 → cocl2
cocl2 +(ch3)2nc6 h4cho→ (ch3)2nc6 h4cl2
(ch3)2nc6 h4cl2 + (c6h5)2nh → yellow product
coefficient ofvariation 15% (for 2.5 to 20ppm), 10% (for 20 to 60 ppm)
shelflife 1years
correctionsfor
temperature & humidity unnecessary
store the tubes in the refrigerator to keep at 10oc(50of) or below.
possible coexisting substances and theirinterferences (note)
substance
concentration
interference
change color by itself
hydrogen chloride
100ppm
plus error
produce yellowstain
chlorine, bromine
50ppm
plus error
produce yellowstain
vinyl chloride,
methylene chloride
- none
nodiscoloration
chloroform
- none
nodiscoloration
methyl bromide
100ppm
plus error
produce yellowstain
tetrachloroethylene
- none
nodiscoloration
methyl chloroform
100ppm
plus error
produce yellowstain
trichloroethylene
- none
nodiscoloration
othersubstance measurable with this detector tube
substance
correction factor
pump strokes
measuring range
chloropicrin
1.0
1
25 to 60%
calibration gasgeneration diffusion tubemethod
tlv-twa tlv-stel explosive range
5ppm 10ppm -