Title: ultrasonic detector
Long Title: IUPAC Gold Book - ultrasonic detector
DOI: 10.1351/goldbook.U06549
Status: current

Definition
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 thermal conductivity detectors are not sufficiently sensitive. The detection threshold is of the order of \(0.1\ \rm{ppmv}\). The linear dynamic range is of the order of \(10^{3}\).

Related Term
- thermal conductivity: https://goldbook.iupac.org//terms/view/T06299

Source
- PAC, 1990, 62, 2167. 'Glossary of atmospheric chemistry terms (Recommendations 1990)' on page 2192 (https://doi.org/10.1351/pac199062112167)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/U06549/html
- json: https://goldbook.iupac.org/terms/view/U06549/json
- xml: https://goldbook.iupac.org/terms/view/U06549/xml

Citation: Citation: 'ultrasonic detector' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.U06549
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Accessed: 2026-08-08T05:05:13+00:00