Title :
Measurement of gas concentrations by means of the power saturation technique in a microwave cavity spectrometer
Author :
Zhu, Z. ; Gibson, C. ; Samuel, A.H. ; Matthews, I.P.
Author_Institution :
Dept. of Epidemiology & Community Med., Univ. of Wales Coll. of Cardiff, UK
fDate :
2/1/1994 12:00:00 AM
Abstract :
The power saturation technique in microwave spectrometry involves measuring a coefficient Γ under conditions of “power saturation”. This paper gives a general expression of Γ for various radiation field configurations in the gas cell. Concentrations of ethylene oxide gas were measured in a microwave spectrometer with a resonant cavity gas cell by using this technique. A relatively good linear correlation was found (to within a standard deviation of 4%) between the output signal and the concentration of ethylene oxide gas in the cavity
Keywords :
cavity resonators; chemical variables measurement; electric sensing devices; gas sensors; microwave measurement; microwave spectrometers; microwave spectroscopy; organic compounds; spectrochemical analysis; ethylene oxide gas; gas concentration; linear correlation; microwave cavity spectrometer; microwave spectrometry; power saturation; quantitative analysis; radiation field configuration; resonant cavity gas cell; Electromagnetic wave absorption; Erbium; Frequency measurement; Genetic expression; Microwave measurements; Microwave theory and techniques; Power measurement; Rectangular waveguides; Resonance; Spectroscopy;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
