Measuring and testing – Gas analysis – By vibration
Patent
1998-03-16
2000-11-21
Larkin, Daniel S.
Measuring and testing
Gas analysis
By vibration
73 2402, 73 233, 25033913, 250343, 356432, 356437, G01N 2117
Patent
active
061486582
ABSTRACT:
A system and method are set forth for photoacoustical analysis of isotope and other compounds having telltale absorption wavelengths between 1700-2500 nm. The system and method includes a Co:Mg F.sub.2, optical parametric oscillator (OPO) or diode laser tunable between 1700-2500 nm which is directed into a sample at energies sufficient to generate detectable acoustical emissions. A microphone detects the emissions for processing and analysis. The system and method is adapted to detect stable isotope compounds such as .sup.13 CO.sub.2 as well as other chemical compounds. For non-gaseous compounds, a CO.sub.2 or diode laser is used to photoablate the baseous sample containing the suspected compounds.
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Larkin Daniel S.
TRW Inc.
Yatsko Michael S.
LandOfFree
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