School of Engineering, Griffith University, Gold Coast, Qld, Australia.
Photochem Photobiol. 2010 May-Jun;86(3):706-10. doi: 10.1111/j.1751-1097.2010.00720.x. Epub 2010 Apr 7.
Poly (2,6-dimethyl-1,4-phenylene oxide) (PPO) film is a useful dosimetric tool for measuring solar UV in underwater and terrestrial environments. However, little is known about how the response of PPO changes with fluctuations in atmospheric ozone and also to seasonal variations. To resolve this issue this article presents a series of long-term in-air solar erythemal response measurements made over a year from 2007 to 2008 with PPO. This data showed that the PPO dose response varies with modulations of the solar spectrum resulting from changes in season and atmospheric ozone. From this, it was recommended that PPO only be calibrated in the season in which it is to be used at the same time as measurements were being made in the field. Extended solar UV measurements made by PPO with a neutral density filter (NDF) based on polyethylene are also detailed. These measurements showed that the lifetime of PPO could be extended by 5 days before saturation. As the dynamic range for PPO is known to be 5 days during summer at a sub-tropical location, the advantage of using the NDF is that half the number of dosimeters is needed to be fabricated and measured before and after exposure.
聚（2,6-二甲基-1,4-亚苯基氧化物）（PPO）薄膜是一种用于测量水下和陆地环境中太阳紫外线的有用剂量测定工具。然而，对于 PPO 的响应如何随大气臭氧的波动以及季节性变化而变化，人们知之甚少。为了解决这个问题，本文介绍了一系列在 2007 年至 2008 年期间进行的长达一年的空气中太阳红斑响应测量，使用了 PPO。该数据表明，PPO 的剂量响应随季节和大气臭氧变化引起的太阳光谱调制而变化。由此建议，仅在 PPO 将被使用的季节进行校准，同时在现场进行测量。还详细介绍了基于聚乙烯的中性密度滤光片（NDF）的 PPO 进行的扩展太阳紫外线测量。这些测量表明，PPO 的寿命可以在饱和前延长 5 天。由于 PPO 的动态范围在亚热带地区夏季已知为 5 天，因此使用 NDF 的优点是在暴露前后需要制造和测量的剂量计数量减少一半。
