Fluorometric determination of selenium in sediments with 2, 3-diaminonaphthalene

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  • TAMARI Yuzo
    Department of Chemistry, Faculty of Science and Technology, Kinki University
  • HIRAKI Keizo
    Department of Chemistry, Faculty of Science and Technology, Kinki University
  • NISHIKAWA Yasuharu
    Department of Chemistry, Faculty of Science and Technology, Kinki University

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Other Title
  • ２，３‐ジアミノナフタレンを用いるたい積物中のセレンのけい光定量
  • 2 3 ジアミノナフタレン オ モチイル タイセキブツチュウ ノ セレン ノ
  • 2,3-ジアミノナフタレンを用いるたい積物中のセレンのけい光定量

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Description

A 2, 3-diaminonaphthalene (DAN)-cyclohexane extraction method is described for the determination of selenium in sediments. A sediment sample weighing 0.05 to 0.2 g is opened up with a mixture of hydrofluoric acid, nitric acid and perchloric acid, and evaporated to strong fumes of perchloric acid. DAN, EDTA and sodium fluoride are added to the perchloric acid solution and selenium is extracted from the mixed solution (pH 1) with cyclohexane. Selenium in the organic layer is stripped by nitric acid, and subsequently determined fluorometrically with DAN after reduction to selenium (IV) in a boiling hydrochloric acid solution. This method is excellent for the determination of selenium in view of conveniency, rapidity, high sensitivity (detection limit : 0.5 ng Se) and good reproducibility. Results are also quoted on the analysis of biological materials such as NBS Orchard Leaves and Bovine Liver for selenium.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 28 (3), 164-169, 1979

    The Japan Society for Analytical Chemistry

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