J. Phys. IV France
Volume 137, November 2006
Page(s) 385 - 390
Publié en ligne 23 décembre 2006
35th Winter School on Wave and Quantum Acoustics
J. Bodzenta, M. Dzida and T. Pustelny
J. Phys. IV France 137 (2006) 385-390

DOI: 10.1051/jp4:2006137072

Scattering photoacoustic study of weakly-absorbing substances in aqueous suspensions

Z. Zhao and R. Myllylä

Department of Electrical and Information Engineering and Infotech Oulu, University of Oulu, 90014 Oulu, Finland

(Published online 23 December 2006)

This study explores the application of the scattering photoacoustic (SPA) technique to the study of weakly-absorbing substances in suspensions. The technique allows the scattering and PA properties of weakly absorbing materials to be examined simultaneously. The experiment reported here measured the reduced scattering coefficients of milk, intralipid and polystyrene suspensions with and without glucose. It turned out that in milk the SPA method has a higher detection sensitivity for fat than for glucose. Nonetheless, glucose was observed to have a larger effect on scattering in light milk and intralipid-1% bases than in non-fat milk and polystyrene-0.5% bases, although the scattering effect contributed little to the PA signal produced in the suspensions.

© EDP Sciences 2006