Application Range
Standard Measuring Range: 10 to 180 mg/m3
Corresponds to 4 to 70 ppm.
Number of Strokes n: 10
Time for Measurement: approx. 7 min
Standard Deviation: ± 20 to 30 %
Color Change: white -› pink
Ambient Operating Conditions
Temperature: 10 to 35°C
Absolute Humidity: 5 to 15 mg H2O / L
Reaction Principle
a) OH-C2H4-OH -> 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 glycol in the presence of
formal dehyde and ethylene oxide because they produce the same
discoloration
Additional Information
The reagent ampoule must be broken before carrying out the measurement.
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