J. Phys. IV France
Volume 125, June 2005
Page(s) 757 - 759

J. Phys. IV France 125 (2005) 757-759

DOI: 10.1051/jp4:2005125174

Photoacoustic spectroscopy to evaluate the penetration rate of three different sunscreens into human skin in vivo

F. Pedrochi1, E. Sehn1, A.N. Medina1, A.C. Bento1, M.L. Baesso1, A. Storck2 and J.L. Gesztesi2

1  Departamento de Física, Universidade Estadual de Maringá, Av. Colombo, 5790, 87020-900, Maringá, PR, Brazil
2  Departamento de Tecnologia de Conceitos Avançados, Natura Inovação e Tecnologia de Produtos, Rod. Anhanguera Km 30.5, 07750-000, Cajamar, SP, Brazil

In this work, the Photoacoustic Spectroscopy was employed to evaluate in vivo the penetration rate of three different sunscreens into the human skin. The results showed the reduction of the sunscreens amount in the skin surface as a function of time, the depth profile, and also permitted to discriminate the penetration rates of the products, which was done through an statistical treatment of the data. The results of this work reinforce the ability of the photoacoustic spectroscopy for "in vivo" measurements.

© EDP Sciences 2005