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 spot concentrations of specific gases. Measurement usually takes between 4 seconds and 15 minutes. The tubes are used either manually with the Draeger-Tube Accuro Pump or automatically with the Draeger X-act 5000.
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
Chromic Acid Detection Tubes 0.1/a (0.1 - 0.5 mg/m3)
| 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. |
Chromic Acid Detection Tubes 0.1/a (0.1 - 0.5 mg/m3)
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