Using ultrasonic wave reflection to measure solution properties.
Ultrasonic wave reflection coefficients of aqueous solutions were measured using high-impact polystyrene as a buffer material to provide enhanced sensitivity over metal or ceramic buffer materials. The wave reflection values showed linear reduction when the concentration of chemical species in solution was increased, but a distinct relation between concentration and reflection coefficient was obtained for each solute species tested. However, more unified relationships were observed between reflection coefficient and other solution parameters - solution density, acoustic impedance, and P-wave velocity - that were consistent for all solution species. Based on this behavior an expression to compute solution density solely from reflection coefficient is derived, which can be applied to estimate solution density in solutions of unknown solute species and concentration when other measurements, such as wave velocity, are not possible.
Chung
Chul-Woo
CW
Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Post 205 N., Mathews Ave., MC-250, Urbana, IL 61801, USA.
Popovics
John S
JS
Struble
Leslie J
LJ
D000465:Algorithms; D003198:Computer Simulation; D008956:Models, Chemical; D012996:Solutions / Q000032:analysis* / Q000737:chemistry*; D014463:Ultrasonography / Q000379:methods*
D012996:Solutions