Mercaptan Detection Tubes 20/a (20 - 100 ppm)
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 vapors 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:
||20 to 100 ppm
|Number of strokes n:
|Time for Measurement:
||approx. 2.5 min
||± 10 to 15 %
||white ──> yellow brown
||0 to 50°C
||3 to 30 mg H2O / L
||a) 2 R-SH + Cu2+ ──> Cu(RS)2 + 2H+
b) Cu(RS)2 + S ──> yellow brown copper compound
||Higher molecular weight alkyl mercaptans (e.g. propyl- and butylmercaptans) are indicated with approximately the same sensitivity.
Hydrogen sulfide is indicated with approximately twice the sensitivity of the mercaptans (e.g. 10 ppm hydrogen sulfide gives an indication of 20 ppm). In presence of Hydrogen Sulfide a measurement of mercaptans is impossible.
||After performing the required ten pump strokes the reagent ampoule must be broken. The liquid of the ampoule must be transferred to the indicating layer and carefully drawn through it using the pump. After completing the measurement wait for 3 min prior to evaluation.