UVA/UVB sunscreen determination by second-order derivative ultraviolet spectrophotometry.

@article{Azevedo1999UVAUVBSD,
  title={UVA/UVB sunscreen determination by second-order derivative ultraviolet spectrophotometry.},
  author={Jos{\'e} Paulo S. de Azevedo and N S Viana Junior and C D Vianna Soares},
  journal={Farmaco},
  year={1999},
  volume={54 9},
  pages={
          573-8
        }
}
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… CONTINUE READING

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