UVA:UVB sunscreen determination by second-order derivative ultraviolet spectrophotometry.
| dc.contributor.author | Souza, Jacqueline de | |
| dc.contributor.author | Viana Júnior, Nilton de Souza | |
| dc.contributor.author | Soares, Cristina Duarte Vianna | |
| dc.date.accessioned | 2014-09-08T19:08:32Z | |
| dc.date.available | 2014-09-08T19:08:32Z | |
| dc.date.issued | 1999 | |
| dc.description.abstract | UVA:UVB protective agents are important constituents in many cosmetics and sunscreen preparations. Analytical methodologies which enable the determination of combined substances with different spectrophotometric characteristics are therefore useful and cost-effective. To this end, the following substances in a sunscreen gel were analyzed: the UVB and UVA protective substances, 2-hydroxy-4-methoxy-benzophenone-5-sulphonic acid (BZP) and 2 phenylbenzymidazole-5-sulphonic acid (PBS), respectively, were evaluated by second-order derivative ultraviolet spectrophotometry in distinct solvents and wavelengths. The method used for determination of BZP in 95% ethanol was the zero-peak (ZP) at 356.0 nm. For PBS, the solvent used was 0.1 mol l_1 triethanolamine, and the methods were the ZP at 317.5 nm and the peak-peak (PP) at 317.5–323.0 nm. Statistical results for the methods showed linearity of 0.9999 and an average precision of 1.12% (ZP) for BZP, and 0.55% (ZP) and 0.63% (PP) for PBS. The average recovery for BZP and PBS were 97.28% (ZP), 103.13% (ZP) and 103.71% (PP), respectively. © 1999 Elsevier Science S.A. All rights reserved. | pt_BR |
| dc.identifier.citation | SOUZA, J.; VIANA JÚNIOR, N. de S.; SOARES, C. D. V. UVA:UVB sunscreen determination by second-order derivative ultraviolet spectrophotometry. Il Farmaco, Itália, v. 54, p. 573-578, 1999. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0014827X99000634#>. Acesso em: 2 set. 2014. | pt_BR |
| dc.identifier.doi | https://doi.org/10.1016/S0014-827X(99)00063-4 | |
| dc.identifier.issn | 0014-827X | |
| dc.identifier.uri | http://www.repositorio.ufop.br/handle/123456789/3622 | |
| dc.language.iso | en_US | pt_BR |
| dc.rights.license | O periódico Il Farmaco concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3456021267480. | pt_BR |
| dc.subject | UVA:UVB sunscreen | pt_BR |
| dc.subject | Ultraviolet spectrophotometry | pt_BR |
| dc.subject | Second-order derivative | pt_BR |
| dc.subject | Cosmetics determination | pt_BR |
| dc.title | UVA:UVB sunscreen determination by second-order derivative ultraviolet spectrophotometry. | pt_BR |
| dc.type | Artigo publicado em periodico | pt_BR |