Application Range
Standard Measuring Range: 1 to 15 ppm
Number of Strokes n: 20
Time for Measurement: approx. 8 min
Standard Deviation: ± 20 to 30 %
Color Change: white -› pink
Ambient Operating Conditions
Temperature: 10 to 35°C
Absolute Humidity: 3 to 15 mg H2O / L
Reaction Principle
a) Ethylene Oxide -> HCHO
b) HCHO + C6H4(CH3)2 + H2SO4 -> quinoid reaction products
Cross Sensitivity
Styrene, vinyl acetate and acetaldehyde are indicated with a yellowish brown discoloration.
It is impossible to measure ethylene oxide in the presence of ethylene glycol and formaldehyde because they produce the same discoloration.
Additional Information
The reagent ampoule must be broken before carrying out the measurement.
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