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

Thesis/Dissertation · Wed Jul 01 00:00:00 EDT 1992

OSTI ID:10160387

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: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 10160387
• Report Number(s): LA-12352-T; ON: DE92017293
• Resource Relation: Other Information: DN: Thesis. Submitted to Colorado State Univ., Fort Collins, CO.; TH: Thesis (M.S.); PBD: Jul 1992
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
47 OTHER INSTRUMENTATION
SODIUM CHLORIDES
DENSITY
CONCENTRATION RATIO
INTERFEROMETRY
ULTRASONIC WAVES
STAINLESS STEELS
PIPES
FOURIER TRANSFORMATION
MEASURING METHODS
ACCURACY
SOLUTIONS
400102
320303
440800
CHEMICAL AND SPECTRAL PROCEDURES
EQUIPMENT AND PROCESSES
MISCELLANEOUS INSTRUMENTATION