Comparisons of a conventional photoacoustic cell with an acoustic window photoacoustic cell

A conventional photoacoustic measurement cell is compared with the newly developed acoustic window photoacoustic window cell both theoretically and experimentally using liquid and power samples. The results indicate that the signal strengths from the two cell types are about equal for liquid samples in practical cells. This is important since the acoustic window cell was developed with applications to on-line analysis of liquids in mind. When powder samples are used in the acoustic window cell saturation effects can be important, and it is possible that the acoustic window cell can be used on powder samples with low light absorption.