Photoacoustic spectrometry - Application to gas analysis

Photoacoustic spectrometry (PAS) is the main subject of this article. This method allows for the reliable detection and analysis of toxic gases and pollutants. To begin with, the overall principle of this method is presented together with the history of the technique and modern photoacoustic spectrometry. The analysis of the gas detection process via noise detection, signal-to-noise ratio and signal improvement appears to be essential. The application to methane gas detection is also dealt with in this article.