環境水試料中セレンの目視蛍光定量システムの構築

概要

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Selenium(IV) and Se(VI) were visually detected and determined based on fluorometricderivatization used by 2,3-diaminonaphtalene (DAN) and β-cyclodextrin (β-CD) / sodiumdodecyl sulfate (SDS) as fluorometric enhancer. The visual determination of Se was achieved byremoving non-reacted DAN, which causes severe interferences and shows high background forvisual determination, with a cation exchange treatment. The cation exchange treatment providedover 90% of its removal efficiency without loss of Se-DAN. In order to determine Se(VI), Se(VI)was converted to Se(IV) based on the reduction of the treatment under 6 mol l-1 HCl at 110 °C.Se(IV) and Se(VI) in a river water and a seawater sample could be quantitively recovered throughthe Se-DAN derivatization and the cation exchange treatment. Under the optimal condition forvisual determination of Se, the fluorometric color was visually detected from 20 μg l-1 to 5000 μg l-1of Se(IV) and from 100 μg l-1 to 5000 μg l-1 of Se(VI) and the difference of the color every 20-50 μgl-1 was distinguished.
徳島大学の論文