溶媒抽出及びリバースフローインジェクション法による天然水の金属錯化容量の測定と評価(関東支部創立40周年記念)

DOI NDLデジタルコレクション Web Site Web Site 参考文献40件

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タイトル別名
  • Metal complexing capacity of natural waters based on solvent extraction and reverse FIA.
  • 溶媒抽出及びリバースフローインジェクション法による天然水の金属錯化容量の測定と評価
  • ヨウバイ チュウシュツ オヨビ リバースフロー インジェクションホウ ニヨル

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説明

Methods for the measurement of copper(II) complexing capacity (CuCC) of natural waters by using a back-extraction of bis(benzoyltrifluoroacetonate) copper(II) (Cu(bfa)2) and the dithizone extraction rate of copper(II) complex were described. From the measurements of CuCC of river water samples, it was found that the CuCC of the water sample in the urban area was larger than that up-stream, due to a ligand originating from human activities. The conditional stability constant (β) of the resulting copper(II) complex was determined by using the back-extraction method.β values of river water samples were 1091010 order of magnitude. Free copper(II) concentration of the Kiryu river was estimated by using the side-reaction coefficient in the extraction of copper(II) with tenoyltrifluoroacetone. The free copper(II) concentration was estimated to be 10-13 mol dm-3 which is 10-5 of total copper. Most of the copper(II) in the river, therefore, is complexed with naturally occurring ligands. A procedure for the measurement of metal complexing capacity by using reverse flow injection analysis (r-FIA) system was also described. The applicability of the method was evaluated by measuring zinc(II), cadmium(II) and lead(II) complexing capacities of both river and lake waters. The values obtained by the r-FIA system were in the same order of magnitude as those obtained by the back-extraction method, indicating the usefulness of the r-FIA method for the estimation of complexing capacity.

収録刊行物

  • 分析化学

    分析化学 44 (12), 989-999, 1995

    公益社団法人 日本分析化学会

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