Formaldehyde 2/a, 2 - 40 PPM, (8101751)
Formaldehyde 2/a, 2 - 40 PPM, Part # 8101751, 10 Tests
Standard Measuring Range: 2 to 40 ppm
Number of Strokes n: 5
Time for Measurement: approx. 30 s
Standard Deviation: ± 20 to 30 %
Color Change: white pink
Ambient Operating Conditions
Temperature: 0 to 40 °C
Absolute Humidity: 3 to 15 mg H2O / L
HCHO + C6H4(CH3)2 + H2SO4 quinoid reaction products
Styrene, vinyl acetate, acetaldehyde, acrolein, diesel fuel and furfuryl alcohol are indicated with a yellowish brown discoloration. 500 ppm Octane, 5 ppm nitric oxide and 5 ppm nitrogen dioxide have no effect.
The reagent ampoule must be broken before carrying out the measurement.