Method for detecting trace impurities in gases
Patent
·
OSTI ID:863871
- Santa Fe, NM
- Los Alamos, NM
A technique for considerably improving the sensitivity and specificity of infrared spectrometry as applied to quantitative determination of trace impurities in various carrier or solvent gases is presented. A gas to be examined for impurities is liquefied and infrared absorption spectra of the liquid are obtained. Spectral simplification and number densities of impurities in the optical path are substantially higher than are obtainable in similar gas-phase analyses. Carbon dioxide impurity (.about.2 ppm) present in commercial Xe and ppm levels of Freon 12 and vinyl chloride added to liquefied air are used to illustrate the method.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 4264814
- OSTI ID:
- 863871
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
method
detecting
trace
impurities
gases
technique
considerably
improving
sensitivity
specificity
infrared
spectrometry
applied
quantitative
determination
various
carrier
solvent
gas
examined
liquefied
absorption
spectra
liquid
obtained
spectral
simplification
densities
optical
path
substantially
obtainable
similar
gas-phase
analyses
carbon
dioxide
impurity
ppm
commercial
xe
levels
freon
12
vinyl
chloride
added
air
illustrate
quantitative determination
vinyl chloride
carbon dioxide
optical path
trace impurities
absorption spectra
detecting trace
infrared spectrometry
/250/
detecting
trace
impurities
gases
technique
considerably
improving
sensitivity
specificity
infrared
spectrometry
applied
quantitative
determination
various
carrier
solvent
gas
examined
liquefied
absorption
spectra
liquid
obtained
spectral
simplification
densities
optical
path
substantially
obtainable
similar
gas-phase
analyses
carbon
dioxide
impurity
ppm
commercial
xe
levels
freon
12
vinyl
chloride
added
air
illustrate
quantitative determination
vinyl chloride
carbon dioxide
optical path
trace impurities
absorption spectra
detecting trace
infrared spectrometry
/250/