Direct determination of absolute light intensity in UV-transmitting and UV-dispersive fluoro polymer tubes.
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概要
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To determine the absolute light intensity (including the reflective, scattered, and incident light intensity) in a UV-transmitting and UV-dispersive fluoro polymer tube, a new chemical actinometer, DPOF system, was introduced which was composed of dilute potassium tris(oxalato)ferrate(III), 0.03 mol m<SUP>−3</SUP>; 1,10-phenanthroline, 0.135 mol m<SUP>−3</SUP>; and potassium oxalate, 1.5 mol m<SUP>−3</SUP>. The overall light intensity was determined with a simple procedure based on a precise analysis of the photochemical kinetics of a DPOF system. The absolute intensities at 366 nm in the UV-transmitting and UV-dispersive Teflon FEP and Folaflon PVdF tubes were detected to be higher than that in a fused-silica tube of similar size while the incident light intensities in the former tubes were always lower than that in the latter. In addition, the dispersive effect of a Teflon FEP tube was rather independent of the wall thickness and the tube diameter under the experimental conditions studied, owing to its high dispersibility of light. The dispersive effect was much more remarkable for the Folaflon PVdF tube. The property of light transmission with dispersion, with the characteristic of antifouling, would make the fluoro polymer tubes useful for novel photoreactors in various areas.
- 公益社団法人 日本化学会の論文
著者
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Funayama Hitoshi
Department of Materials Engineering, Aktia National College of Technology
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SUGAWARA TAKUO
Department of Chemical Engineering for Resources, Akita University
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Funayama Hitoshi
Department of Industrial Chemistry, Akita National College of Technology
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