Srinivasan, J and Kumar, R and Gandhi, KS (1987) A Theory for the Enhancement of the Photoacoustic Signals by Volatile Liquids. In: Applied Physics B: Lasers and Optics, 43 (1). pp. 35-41.
It has been shown experimentally that photoacoustic signals can be enhanced by introduction of a volatile liquid into the cell. Korpiun developed a theory which predicted the enhancement to be proportional to the mole fraction of the volatile component $(y_0)$ in the gas phase. His theory is, however, based on a species conservation equation valid for dilute solutions only. We present a rigorous theory for predicting the enhancement of potoacoustic signal. Our theory shows the enhancement to be proportional to $y_0/(1-y_0)$ which compares well with observations of Ganguly and Somasundaram.