Chromic Acid Detection Tubes 0.1/a (0.1 - 0.5 mg/m3)

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Item #: 6728681
MFG: Draeger
UOM: Box of 10
Min Order: 0
Order Qty: Must order in multiples of 1
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Chromic Acid Detection Tubes 0.1/a (0.1 - 0.5 mg/m3)

For short-term measurements more than 160 Draeger Tubes are available to measure the so called spot concentrations of specific gases.

A wide range of different gases and vapours can be detected and measured, such as:

  • Determining and measuring concentration peaks
  • Measuring personal exposure in the inhalation area
  • Detecting leaks in pipelines, gas installations etc.
  • Air analysis in sewers, shafts and confined spaces
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 ─> violet
Temperature: 5 to 40° C
Absolute Humidity: < 20 mg H2O / L
Reaction Principle: a) CrO3 + H2SO4 ──> CrVI
b) CrVI + diphenylcarbazide ──> CrIII + diphenylcarbazone
Cross Sensitivity: Metal chromates such as zine 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.