Solution density and concentration measurement using noninvasive in situ ultrasonic resonance interferometry

Technical Report · Wed Jul 01 04:00:00 EDT 1992

OSTI ID:7281691

Pope, N G

A method of noninvasively measuring the density and concentration of NaCl solutions contained within stainless steel pipes has been developed. The pipe-solution system was energized using an ultrasonic transducer resulting in resonances at specific frequencies. The periodicity of the resonant peaks was determined by analyzing ultrasonic voltage response data using a fast Fourier transform to yield the power spectrum. In preliminary studies the periodicity was measured directly from the voltage response spectrum. The resonant periodicities were correlated against known NaCl density and concentration standards. The concentration of unknown NaCl solutions was measured in situ with an accuracy of {plus minus}O.15 M over a range of 0.4 to 3.4 M. The precision of each of the measurements range from 1 part in 10,000 to 1 part in 1000. The error resulting from temperature was at most 0.0287 M per degree Celsius or 0.59% over the range measured. Data collection time ranged from 1.7 seconds to 17.0 seconds. Literature on similar but invasive techniques suggests that the technique developed here could be applied to a variety of industrial solutions including acids, caustics, petrochemicals, gases, foodstuffs, and beverages.

• Research Organization: Los Alamos National Lab., NM (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 7281691
• Report Number(s): LA-12352-T; ON: DE92017293
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320303 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Equipment & Processes
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
440800 -- Miscellaneous Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
ACCURACY
ALKALI METAL COMPOUNDS
ALLOYS
CHLORIDES
CHLORINE COMPOUNDS
CONCENTRATION RATIO
DENSITY
DISPERSIONS
FOURIER TRANSFORMATION
HALIDES
HALOGEN COMPOUNDS
HIGH ALLOY STEELS
INTEGRAL TRANSFORMATIONS
INTERFEROMETRY
IRON ALLOYS
IRON BASE ALLOYS
MEASURING METHODS
MIXTURES
PHYSICAL PROPERTIES
PIPES
SODIUM CHLORIDES
SODIUM COMPOUNDS
SOLUTIONS
SOUND WAVES
STAINLESS STEELS
STEELS
TRANSFORMATIONS
ULTRASONIC WAVES