氯乙烯氣體檢測管131L Vinyl chloride 的詳細(xì)介紹
氯乙烯氣體檢測管131L Vinyl chloride
Vinyl chloride              No.131LCH2:CHCl
Performance
 
MeasuringRange
0.1 to 0.2 ppm
0.2 to 3.0 ppm
3.0 to 6.6 ppm
Number of Pump Strokes
4
2
1
CorrectionFactor
1/2
1
2.2
SamplingTime
1.5 minutes per pumpstroke
DetectingLimit
0.02 ppm (n=4)
ColorChange
Yellow → Reddishbrown
ReactionPrinciple
CH2:CHCl + Cr6+ + H2SO4 → HCl
HCl + Base → Chlorides
Coefficient ofVariation 10% (for0.2 to 1 ppm), 5% (for 1 to 4 ppm)
ShelfLife 2Years
Correctionsfor
temperature & humidity Temperature correction is necessary
Store the tubes inthe refrigerator to keep at 10oC (50oF) orbelow.

Possible coexisting substances and theirinterferences (NOTE)


Substance
Concentration
Interference
Change color by itself
Ethylene
200 ppm
Minus error
Nodiscoloration
Tetrachloroethylene
1/3 conc.
Plus error
Produce reddishbrown
Trichloroethylene
1/5 conc.
Plus error
Produce reddishbrown
Benzene,Toluene
200 ppm
Minus error
Nodiscoloration