Trace water vapor detection in nitrogen and hydrogen chloride gases by FTIR spectroscopy

Conference · Sun May 01 00:00:00 EDT 1994

OSTI ID:10133938

Stallard, B. R. ^[1]; Rowe, R. K. ^[1]; Espinoza, L. H. ^[2]; Niemczyk, T. M. ^[2]

---

1. Sandia National Labs., Albuquerque, NM (United States)
2. New Mexico Univ., Albuquerque, NM (United States). Dept. of Chemistry

An optical instrument for the determination of trace H₂0 in N₂ and HCI gases has been built. It is based on a commercial Fourier transform infrared spectrometer (modified to improve the purge), a long-path gas cell, and classical least squares data analysis. The optimum instrumental parameters have been determined. Particularly important, is the finding that maximal precision is obtained at low resolution, implying that future instruments may be based on less expensive, low-resolution spectrometers. A calibration over the range of 40 to 1800 ppB has been performed and found to be in good agreement with published spectral data. Also, detection limits have been shown to be about 10 ppB. Suggestions are made to improve the design of the instrument.

• Research Organization: Sandia National Labs., Albuquerque, NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 10133938
• Report Number(s): SAND--94-0287C; CONF-940529--3; ON: DE94008434; BR: GB0103012
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102
440600
47 OTHER INSTRUMENTATION
CHEMICAL AND SPECTRAL PROCEDURES
DATA ANALYSIS
DESIGN
EMISSION SPECTROSCOPY
FOURIER TRANSFORM SPECTROMETERS
HYDROCHLORIC ACID
NITROGEN
OPTICAL INSTRUMENTATION
OPTICAL SYSTEMS
QUANTITATIVE CHEMICAL ANALYSIS
TRACE AMOUNTS
WATER VAPOR