１，１０‐フェナントロリンを含む希薄なしゅう酸鉄（ＩＩＩ）カリウム水溶液の光分解を利用した新しい化学光量計の開発

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  • Development of New Chemical Actinometer Incorporating Photolysis of Dilute Potassium Trisoxalatoferrate Aqueous Solution Containing 1, 10-Phenanthroline
  • 1,10 フェナントロリン オ フクム キハク ナ シュウサン テツ 3 カリ

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A new chemical actinometer has been developed which detects absolute light intensity in heterogeneous photoreactors where light reflection and dispersion are superimposed by dispersed phases.<BR>Dilute potassium trisoxalatoferrate aqueous solution (concentration of 0.03 mol. m-3) containing 1, 10-phenanthroline, 0.135 moil·m-3, and potassium oxalate, 1.5 mol·m-3, was irradiated by 366 nm monochromatic parallel light in a temperature range from 20 to 40°C;and the photolysis of potassium trisoxalatoferrate was kinetically studied. Two parameters were determined in the derived reaction-rate equation in consideration of the effects of diffusions of reactants and products, and that of internal light filtering.<BR>The absolute light intensity including the effect of reflection was measured in a cell-type batch reactor with a reflector, with using this aqueous solution (dilute potassium trisoxalatoferrate chemical actinometer, or DPOF chemical actinometer). A method is shown for determining the absolute light intensity in heterogeneous photoreactors with DPOF chemical actinometer having optical lengths for which internal light filtering is negligible.

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