Quistorf Jan Carlos, Kockott Dieter, Garbe Birgit, Heinrich Ulrike, Tronnier Hagen, Braun Nicole
Institute for Experimental Dermatology, DermaTronnier, Witten/Herdecke University, Witten, Germany.
Skin Pharmacol Physiol. 2017;30(4):171-179. doi: 10.1159/000475474. Epub 2017 May 31.
Every day human skin is exposed to infrared A (IRA) radiation as part of the natural sun rays. As IRA radiation accounts for around one third of the solar radiation, it has gained great attention concerning its effects on the human body and skin. In the past few years it has been discussed controversially whether IRA radiation (of solar origin) is harmful or not. Nonetheless, there are several sunscreens on the German market that claim IRA protection for themselves.
The present study seeks to find an experimental set-up and a test procedure for the determination and quantification of direct IRA protection (realized via reflection or absorption of the IRA radiation), since to our knowledge these do not yet exist.
In this study we proved the usability of a set-up consisting of a light source, an IRA-transmissible filter system and a sensor unit, for the determination and quantification of the IRA protection of cosmetic and non-cosmetic samples.
RESULTS/CONCLUSION: The applicability of the IRA emission of the light source, the spectral detector, transmissivity of the filter systems and the sample carriers could be validated. This experimental set-up can be used as an in vitro test procedure for the determination of direct IRA protection.
作为自然阳光的一部分，人体皮肤每天都会暴露于红外线A（IRA）辐射。由于IRA辐射约占太阳辐射的三分之一，其对人体和皮肤的影响已引起了极大关注。在过去几年中，关于（源自太阳的）IRA辐射是否有害一直存在争议。尽管如此，德国市场上有几款防晒霜宣称具有IRA防护功能。
由于据我们所知尚无相关方法，本研究旨在找到一种用于测定和量化直接IRA防护（通过反射或吸收IRA辐射实现）的实验装置和测试程序。
在本研究中，我们证明了一种由光源、IRA透射滤光系统和传感器单元组成的装置可用于测定和量化化妆品及非化妆品样品的IRA防护效果。
结果/结论：光源的IRA发射、光谱探测器、滤光系统和样品载体的透射率的适用性均得到了验证。该实验装置可作为一种体外测试程序用于测定直接IRA防护效果。
