Determination of sun protection factor (SPF) of sunscreens by ultraviolet spectrophotometry

Authors

  • Elizângela Abreu Dutra Universidade de São Paulo; Faculdade de Ciências Farmacêuticas; Departamento de Farmácia
  • Daniella Almança Gonçalves da Costa e Oliveira Universidade de São Paulo; Faculdade de Ciências Farmacêuticas; Departamento de Farmácia
  • Erika Rosa Maria Kedor-Hackmann Universidade de São Paulo; Faculdade de Ciências Farmacêuticas; Departamento de Farmácia
  • Maria Inês Rocha Miritello Santoro Universidade de São Paulo; Faculdade de Ciências Farmacêuticas; Departamento de Farmácia

DOI:

https://doi.org/10.1590/S1516-93322004000300014

Keywords:

Sunscreens, Cosmetic products, Sun protection factor, UV spectrophotometry

Abstract

The aim of this research was to determine the sun protection factor (SPF) of sunscreens emulsions containing chemical and physical sunscreens by ultraviolet spectrophotometry. Ten different commercially available samples of sunscreen emulsions of various manufactures were evaluated. The SPF labeled values were in the range of 8 to 30. The SPF values of the 30% of the analyzed samples are in close agreement with the labeled SPF, 30% presented SPF values above the labeled amount and 40% presented SPF values under the labeled amount. The proposed spectrophotometric method is simple and rapid for the in vitro determination of SPF values of sunscreens emulsions.

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Published

2004-09-01

Issue

Vol. 40 No. 3 (2004)

Section

Original Papers

How to Cite

Determination of sun protection factor (SPF) of sunscreens by ultraviolet spectrophotometry. (2004). Revista Brasileira De Ciências Farmacêuticas, 40(3), 381-385. https://doi.org/10.1590/S1516-93322004000300014