Dräger Tube Chromic Acid 0.1/a - PN: 6728681
Dräger Tube Chromic Acid 0.1/a (9)
PN: 6728681
Dräger-Tubes™ are used together with a Dräger tube pump for measurements of gases, vapors and aerosols, usually in air, and are one of the classic methods of gas analysis. This Dräger-Tube is used for the detection of chromic acid and has the following standard measuring range: 0.1-0.5 mg/m³ Measurements: 9
Application Range
Standard Measuring Range: 0.1 to 0.5 mg/m3 Discoloration compared to color standard.
Number of Strokes n: 40
Time for Measurement: approx. 8 min
Standard Deviation: ± 50 %
Color Change: white ä violet
Ambient Operating Conditions
Temperature: 5 to 40 °C
Absolute Humidity: < 20 mg H2O / L
Reaction Principle
a) CrO3 + H2SO4 ä CrVI
b) CrVI + diphenylcarbazide ä CrIII + diphenylcarbazone
Cross Sensitivity
Metal chromates such as zinc or strontium chromate are indicated with about half the sensitivity. CrIII compounds do not affect the indication. Very high chromate concentrations lead to a rapid bleaching of the indication. Measurements should be repeated with less strokes.
Additional Information
After carrying out the required 40 pump strokes the reagent ampoule must be broken, the liquid transferred onto the indicating layer and carefully drawn through it using the pump.
Dräger Tube Chromic Acid 0.1/a (9)
PN: 6728681
Dräger-Tubes™ are used together with a Dräger tube pump for measurements of gases, vapors and aerosols, usually in air, and are one of the classic methods of gas analysis. This Dräger-Tube is used for the detection of chromic acid and has the following standard measuring range: 0.1-0.5 mg/m³ Measurements: 9
Application Range
Standard Measuring Range: 0.1 to 0.5 mg/m3 Discoloration compared to color standard.
Number of Strokes n: 40
Time for Measurement: approx. 8 min
Standard Deviation: ± 50 %
Color Change: white ä violet
Ambient Operating Conditions
Temperature: 5 to 40 °C
Absolute Humidity: < 20 mg H2O / L
Reaction Principle
a) CrO3 + H2SO4 ä CrVI
b) CrVI + diphenylcarbazide ä CrIII + diphenylcarbazone
Cross Sensitivity
Metal chromates such as zinc or strontium chromate are indicated with about half the sensitivity. CrIII compounds do not affect the indication. Very high chromate concentrations lead to a rapid bleaching of the indication. Measurements should be repeated with less strokes.
Additional Information
After carrying out the required 40 pump strokes the reagent ampoule must be broken, the liquid transferred onto the indicating layer and carefully drawn through it using the pump.
