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Detection of moisture content in high-purity ammonia by means of diode-laser spectroscopy
- Source :
- Applied Physics B. 90:317-321
- Publication Year :
- 2008
- Publisher :
- Springer Science and Business Media LLC, 2008.
-
Abstract
- The aim of this work was the development of an as-simple-as-possible instrument for trace moisture concentration measurements in high-purity ammonia. A near-infrared diode-laser-based instrument has been applied to measure the humidity in a process of on-line detection of water in ammonia during industrial purification. The results of water concentration measurements were compared with alternative techniques (primarily dew-point detection) and good agreement was achieved. The long-term sensitivity of such a diode-laser-based instrument was estimated to be 5 ppm. The calculation of the water concentration from measurements of the integrated volume of water contained in the heavy fraction, extracted during the purification process, yields an even lower detection limit of less than 0.1 ppm, depending on the initial ammonia purity.
- Subjects :
- Detection limit
Materials science
Physics and Astronomy (miscellaneous)
Moisture
business.industry
General Engineering
Analytical chemistry
General Physics and Astronomy
Humidity
Fraction (chemistry)
Ammonia
chemistry.chemical_compound
Optics
Volume (thermodynamics)
chemistry
Dew
business
Water content
Subjects
Details
- ISSN :
- 14320649 and 09462171
- Volume :
- 90
- Database :
- OpenAIRE
- Journal :
- Applied Physics B
- Accession number :
- edsair.doi...........0c51707c897d9098e7236232a0e93f71