Title :
Traceable CO2-R(12) Line Intensity for Laser-Spectroscopy-Based Gas Analysis Near 2 μm
Author :
Padilla-Víquez, Gerardo J. ; Koelliker-Delgado, Jorge ; Werhahn, Olav ; Jousten, Karl ; Schiel, Detlef
Author_Institution :
Laboratorio Costarricense de Metrologia (Lacomet), Ciudad de la Investigation de la UCR, San Pedro de Montes de Oca
fDate :
4/1/2007 12:00:00 AM
Abstract :
The authors determined the CO2-R(12) line intensity (region) employing direct absorption spectroscopy improved by several high-accuracy-oriented new developments, with a relative uncertainty of 0.5%, k = 1. All the input quantities are traceable and the uncertainty was evaluated Guide to the Expression of Uncertainty in Measurement compliant. The result for the line intensity is in agreement with the high-resolution transmission molecular absorption database value but 1.4% smaller. It was applied to partial pressure measurements of CO2 in N2 for samples of gravimetric-traceable known amount of CO2 fractions. The differences of the results obtained from direct absorption spectroscopy and the gravimetric values were 0.4% or less
Keywords :
carbon compounds; density measurement; infrared spectroscopy; measurement by laser beam; pressure measurement; spectral line intensity; spectrochemical analysis; chemical analysis; direct absorption spectroscopy; gas analysis; gravimetry; infrared measurements; infrared spectroscopy; laser-spectroscopy; line intensity; molecular spectra; partial pressure measurements; relative uncertainty; semiconductor lasers; Databases; Electromagnetic wave absorption; Gas industry; Gas lasers; Infrared spectra; Measurement uncertainty; Pressure control; Pressure measurement; Semiconductor lasers; Spectroscopy; Chemical analysis; IR spectroscopy; infrared (IR) measurements; intensities of molecular spectral lines; molecular spectra; p artial pressure measurements; semiconductor lasers;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2007.891160
