Graphite furnace AAS determination of vanadium in natural waters after preconcentration with mini-column chelating resin.

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  • SHIMIZU Tokuo
    Department of Applied Chemistry, Faculty of Engineering, Utsunomiya University
  • ICHIKAWA Kenji
    Department of Applied Chemistry, Faculty of Engineering, Utsunomiya University
  • IZAWA Masayuki
    Department of Applied Chemistry, Faculty of Engineering, Utsunomiya University
  • SHIJO Yoshio
    Department of Applied Chemistry, Faculty of Engineering, Utsunomiya University

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Other Title
  • 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バナジウムの定量
  • ミニカラム キレート ジュシ ノウシュク コクエンロ ゲンシ キュウコウホウ
  • 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バナジウムの定量

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Abstract

A microscale technique for the preconcentration of V at sub-ppb level has been developed. A 10-ml aliquot of the filtered sample and 0.5 ml of 2 M ammonium acetate buffer were pipetted into a mini-column containing 0.25 ml of Chelex 100 resin. The sample solution was adjusted to pH 4.0. By vigorous shaking of the mixture for 30 min (batch operation), V was adsorbed on the resin. The resin was allowed to stand to settle, and the solution was drained through the perforated disc (column operation). After the resin was rinsed with water, V was stripped from the resin with 0.25 ml of 2 M NH4OH. The eluate was submitted to V determination by graphite furnace AAS using a pyrolytic graphite coated tube. A preconcentration factor of 40 times was obtainable using 10 ml of sample. The lower limit of determination was 0.07 μg/1(10 σ). Relative standard deviations were 4.1% (n=5) for 1.25 μg/l of V in river water and 2.7% (n =4) for 1.55 μg/l of V in seawater.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 38 (4), 201-203, 1989

    The Japan Society for Analytical Chemistry

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