Fig. 2
From: Skin color-specific and spectrally-selective naked-eye dosimetry of UVA, B and C radiations
Comparison of different e− donors in reducing PMA on UVR excitation. The main panel compares the ability of different e− donors in reducing PMA after 30 min of UVR excitation. The photographs of the colored solutions post-UVR exposure in the presence of lactic acid are shown. The inset shows the UVR exposure time-dependent response of PMA in the presence of lactic acid. The concentrations of PMA and the e− donor correspond to 1 and 10 mM, respectively, and the UVR intensity is consistent as 15 W m–2 resulting in an effective UV dose of 27,000 J m–2 over 30 min. Each data point represents an average of the colorimetric response obtained from three independent samples and the associated standard deviation
