Skip to main content
padlock icon - secure page this page is secure

J. Cosmet. Sci., 59, 263–289 (July/August 2008)

Microbiological assessment of the ultraviolet screening effect of sunscreen preparations

Buy Article:

$52.00 + tax (Refund Policy)

This paper was presented as a poster in the Industrial Pharmacy section at the International Pharmaceutical Federation (FIP) Congress, Cairo, 2005. Synopsis

The purpose of this study was the development of a microbiological method for the assessment of the ultraviolet (UV) screening effect of sunscreen preparations and determination of their sun protection factor. The method is based on the lethal effect of UV radiation on Escherichia coli and the protective ability of sunscreens. The time of UV exposure required for the reduction of the E. coli viable count by 90% (decimal reduction time, DRT) was used as the photoprotection assessment parameter. The method was tested by assessing the effect of selected experimental variables on the DRT. The suitability of the method as a quality control tool for sunscreen preparations was then checked by assessing the influence of selected formulation variables on the photoprotective effect of a series of o/w emulsion formulations with different compositions. The method proved valid for detecting changes in the photoprotective effect of a market sunscreen product as a result of modifying experimental conditions. It also proved valid for ranking market sunscreen products according to their UV screening effect. Equally important, the method could successfully detect changes in the photoprotective effect of sunscreen test formulations as a function of the concentration and type of the sunscreen agents.
No References
No Citations
No Supplementary Data
No Article Media
No Metrics

Document Type: Abstract

Affiliations: 1: Pharmaceutics and 2: Pharmaceutical Microbiology, Faculty of Pharmacy, University of Alexandria, El-Khartoum Square, Azarita, Alexandria 21521, Egypt

Publication date: August 1, 2009

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more