バソクプロイン固定化ポリ塩化ビニル膜を感応部とする微量銅イオンのフローオプティカルセンシング

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タイトル別名
  • Flow optical sensing for trace copper ion using a poly(vinyl chloride) membrane containing bathocuproine as a detection port.
  • バソクプロイン コテイカ ポリ エンカビニル マク オ カンノウブ ト スル

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The determination of copper ion by flow injection analysis using a polyvinyl chloride (PVC) membrane containing 4, 7-diphenyl-2, 9-dimethyl-1, 10-phenanthroline (bathocuproine) as a detection port has been developed. The PVC membrane containing bathocuproine and ο-nitrophenyloctylether was synthesized and set in a flow-through cell; the flow-through cell was then attached in the cell holder of a spectrophotometer. A carrier solution consisting of 5×10-2 mol dm-3 of hydroxyl ammonium sulfate, 5×10-2 mol dm-3 of sodium chloride and sodium hydroxide was prepared, and pumped at 0.5 ml min-1. The sample volume was 100μl The injected copper ion formed a complex with bathocuproine on the PVC membrane surface in the flow-through cell; the absorbance of the colored membrane was then measured by the spectrophotometer at 481.5 nm. The determinable concentration of copper ion on the proposed method was over the range of 5×10-61×10-4 mol dm-3. The reproducibility of the determined values of copper ion was 3.8% with a relative standard deviation on repeatable experiments of seven times for a 5×10-5 mol dm-3 copper ions sample. Coexisting metal ions had no effect on the determined value of copper ions when their concentrations were equal to or less than the copper-ion concentration. A linear correlation between the determined values by the proposed method and AAS was obtained at a concentration range of 1×10-51×10-4 mol dm-3.

収録刊行物

  • 分析化学

    分析化学 47 (8), 497-502, 1998

    公益社団法人 日本分析化学会

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