Applications of swept-frequency acoustic interferometer for nonintrusive detection and identification of chemical warfare compounds
- Los Alamos National Lab., NM (United States). Electronic Materials and Devices Group
Swept-Frequency Acoustic Interferometry (SFAI) is a nonintrusive liquid characterization technique developed specifically for detecting and identifying chemical warfare (CW) compounds inside sealed munitions. The SFAI technique can rapidly (less than 20 seconds) and accurately determine sound speed and sound attenuation of a liquid inside a container over a wide frequency range (1 kHz-15 MHz). From the frequency-dependent sound attenuation measurement, liquid density is determined. These three physical properties are used to uniquely identify the CW compounds. In addition, various chemical relaxation processes in liquids and particle size distribution in emulsions can also be determined from the frequency-dependent attenuation measurement. The SFAI instrument is battery-operated and highly portable (< 6 lb.). The instrument has many potential application in industry ranging from sensitive detection (ppm level) of contamination to process control. The theory of the technique will be described and examples of several chemical industry applications will be presented.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); Department of Defense, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 555542
- Report Number(s):
- LA-UR-97-3113; CONF-970962-; ON: DE98001326; TRN: AHC29802%%127
- Resource Relation:
- Conference: 214. American Chemical Society meeting, Las Vegas, NV (United States), 7-13 Sep 1997; Other Information: PBD: [1997]
- Country of Publication:
- United States
- Language:
- English
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