Determination of the UV radiation dose of an aerosol using UV-sensitive dyes to optimize UV ​​room air filters

紫外线辐射能有效地灭活细菌和病毒。辐射剂量在评估效率中起着核心作用。然而，目前尚不清楚这些结果是否也适用于气载病毒，当连续过程应用于气溶胶形式的病毒时，暴露时间也是一个决定性因素。为了转移知识的病毒灭活获得与固定液体，模型系统是必要的，使得有可能调查的有效性，紫外线辐射在专门的气溶胶实验室作为一个连续供应的气溶胶。UV敏感染料是已知的，并且已经作为模型系统进行了测试。吸收或荧光的减少可能与辐射剂量（Ws /cm 2）有关。本项目的目的是研究当液体暴露于气溶胶形式的紫外线辐射时，染料颜色强度随剂量率增加而降低（在高安全性实验室中确定的剂量率与病毒和细菌灭活之间存在已知关系）是否仍然适用。这将使得有可能通过测量颜色强度来检查基于紫外线的空气净化器对气溶胶的有效性。

UV radiation is effective in inactivating bacteria and viruses. The radiation dose plays a central role in assessing the efficiency. However, it is unclear whether these results also apply to gas-borne viruses, and exposure time is also a decisive factor when a continuous process is applied to viruses in aerosol form. In order to transfer knowledge about virus inactivation gained with stationary liquids, model systems are needed which make it possible to investigate the effectiveness of UV radiation in specialized aerosol laboratories as a continuously supplied aerosol. UV-sensitive dyes are known and have already been tested as a model system. The decrease in absorption or fluorescence can be related to the radiation dose in Ws /cm2.The aim of this project is to investigate whether the decrease in color intensity of dyes (with a known relationship between dose rate and inactivation of viruses and bacteria determined in a high-security laboratory) with increasing dose rate still applies when the liquid is exposed to UV radiation in aerosol form. This would make it possible to check the effectiveness of UV-based air purifiers for aerosols by measuring the color intensity.