ミニカラム-キレート樹脂濃縮/黒鉛炉原子吸光法による天然水中のコバルトの定量

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タイトル別名
  • Graphite furance AAS determination of cobalt in natural water after preconcentration with mini-column chelating resin.
  • ミニカラム‐キレート樹脂濃縮／黒鉛炉原子吸光法による天然水中のコバルトの定量
  • ミニカラム キレート ジュシ ノウシュク コクエン ゲンシ キュウコウホウ

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A micro-scale technique for the preconcentration of Co at sub-ppb level in natural water samples has been developed. A 10-ml aliquot of filtered sample and 1 ml of pH buffer were added to a mini-column containing 0.25 ml of Unicellex A-100 or B-100. The sample solution was adjusted to pH 4.0. Cobalt was adsorbed on the resin by batch operation (15 min) and then column operation was performed. After the resin was rinsed with water and pH 5.2 buffer, Co was stripped from the resin with 0.2 ml of 2 M hydrochloric acid. The eluate was subjected to Co determination by graphite furnace AAS using a pyrolytic graphite tube. A preconcentration factor of 50 was obtainable using 10 ml of water sample. The lower limit of determination (10σ) was 0.050 μg/l. Relative standard deviations (n = 4), using Unicellex B-100, were 1.0% for 0.97μg/l of Co in river water and 4.5% for 0.22 μg/l of Co in seawater.

収録刊行物

  • 分析化学

    分析化学 40 (1), 45-47, 1991

    公益社団法人 日本分析化学会

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