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Determination of sun protection factor (SPF) of sunscreens by ultraviolet spectrophotometry
Dutra, Elizângela Abreu; Oliveira, Daniella Almança Gonçalves da Costa e; Kedor-Hackmann, Erika Rosa Maria; Santoro, Maria Inês Rocha Miritello.
  • Dutra, Elizângela Abreu; Universidade de São Paulo. Faculdade de Ciências Farmacêuticas. Departamento de Farmácia. BR
  • Oliveira, Daniella Almança Gonçalves da Costa e; Universidade de São Paulo. Faculdade de Ciências Farmacêuticas. Departamento de Farmácia. BR
  • Kedor-Hackmann, Erika Rosa Maria; Universidade de São Paulo. Faculdade de Ciências Farmacêuticas. Departamento de Farmácia. BR
  • Santoro, Maria Inês Rocha Miritello; Universidade de São Paulo. Faculdade de Ciências Farmacêuticas. Departamento de Farmácia. BR
RBCF, Rev. bras. ciênc. farm. (Impr.) ; 40(3): 381-385, jul.-set. 2004. tab
Article in English | LILACS | ID: lil-420686
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 por cento of the analyzed samples are in close agreement with the labeled SPF, 30 por cento presented SPF values above the labeled amount and 40 por cento 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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Full text: Available Index: LILACS (Americas) Main subject: Sunscreening Agents / Cosmetics / Emulsions Language: English Journal: RBCF, Rev. bras. ciênc. farm. (Impr.) Journal subject: Biochemistry / Pharmacy / Pharmacology Year: 2004 Type: Article Affiliation country: Brazil Institution/Affiliation country: Universidade de São Paulo/BR

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Full text: Available Index: LILACS (Americas) Main subject: Sunscreening Agents / Cosmetics / Emulsions Language: English Journal: RBCF, Rev. bras. ciênc. farm. (Impr.) Journal subject: Biochemistry / Pharmacy / Pharmacology Year: 2004 Type: Article Affiliation country: Brazil Institution/Affiliation country: Universidade de São Paulo/BR