Application Range
Standard Measuring Range: 10 to 250 ppm
Number of Strokes n: 20
Time for Measurement: approx. 3 min
Standard Deviation: ± 15 to 20 %
Color Change: white -> red brown
Ambient Operating Conditions
Temperature: 0 to 40 °C
Absolute Humidity: 3 to 15 mg H2O / L
Reaction Principle
Styrene + HCHO -> red brown reaction product
Cross Sensitivity
Other organic compounds, which react with the formaldehyde/ sulfuric acid indicating system (e. g. xylene, toluene, butadiene and ethyl benzene)
affect the indication. It is impossible to measure monostyrene in the presence of these compounds.
No interference by:
200 ppm methanol
500 ppm octane
400 ppm ethyl acetate
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