https://doi.org/10.1351/goldbook.U06549
Sound is generated in a reference cell and a measuring cell. An eluted component passing through the measuring cell changes the velocity of sound in the cell. This change is detected by a phase shift of acoustic signals between the two cells. This detector is usually employed for inorganic gases in the region where . The linear dynamic range is of the order of .
thermal conductivity
detectors are not sufficiently sensitive. The detection threshold is of the order of