| 摘要 |
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 F2, an optical parametric oscillator (OPO), or a 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 13CO2 as well as other chemical compounds. For non-gaseous compounds, a CO2 or diode laser is used to photoablate the gaseous sample containing the suspected compound.
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