1,2-Dichloroethylene

NO.139
ClCHFCHCl
Performance
Measuring Range
5 to 10 ppm 10 to 100 ppm 100 to 250 ppm
Number of Pump Strokes
2 1 1/2
Correction Factor
1/2 1 2.5
Sampling Time 1 minute per pump stroke
Detecting Limit 1 ppm (n=2)
Colour Change Yellow → Reddish Purple
Reaction Principle

ClCH:CHCl + PbO2 + H2SO4 → HCl
HCl + Base → Chloride

Coefficient of Variation 10% (for 10 to 20 ppm), 5% (for 20 to 100 ppm)
Shelf Life 2 Years
Corrections for temperature & humidity Temperature correction is necessary
Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below.
Possible coexisting substances and their interferences (NOTE)
Substance Concentration Interference Change colour by itself to
Nitrogen oxides   No No
Hydrogen chloride, Halogens   + Reddish purple
Tetrachloroethylene   + Reddish purple
Trichloroethylene   + Reddish purple
Calibration gas generation Diffusion tube method
TLV-TWA TLV-STEL Explosive range
200 ppm - -


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