市面常见防晒霜防晒性能的化学评测

Chemical Evaluation of Common Sunscreens Performance in the Market

摘要: 本实验通过测量市面常见13款防晒霜的吸光度与国家标准做对比，发现8种防晒霜达到了完全防护紫外线效果，1种防晒达到了高度防护紫外线照射效果，3种防晒霜达到中等防护紫外线效果，1种只有最小防护紫外线效果。同时，研究了5种防晒霜防晒效果随着涂抹时间的变化，分析不同变化趋势产生的原因可能是由于不同防晒霜中物理防晒成分和化学防晒成分的配比不同造成的。此外，对开封时间达一年以上的9种防晒霜的防晒效果进行测试发现除F防晒霜达到完全防护紫外线照射的效果，G防晒霜达到中等防晒的效果，其余7种防晒霜已基本没有了防晒效果。

Abstract: In this experiment, by measuring the absorbance of 13 common sunscreens and comparing with the national standard, it is found that 8 sunscreens achieve the effect of UV protection completely, 1 sunscreen achieves the effect of high UV protection, 3 sunscreens achieve the effect of medium UV protection, and 1 has only the minimum UV protection. At the same time, the change of sunscreen effect of 5 sunscreens with application time is studied. The analysis of different trends may be due to the different ratio of physical components and chemical components in different sunscreens. In addition, the effect of 9 sunscreens that have been opened for more than one year was tested. It was found that only F can achieve the complete effect of UV protection, G can achieve medium effect, the other 7 sunscreens have no use in protecting against ultraviolet radiation.