Selective determination of inorganic and organic arsenic in high salts wastewater by graphite-furnace AAS after lanthanum hydroxide coprecipitation and reductive distillation.

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Other Title
  • 水酸化ランタン共沈分離／還元蒸留／黒鉛炉原子吸光法による高塩濃度廃水中の無機ヒ素（ＩＩＩ，Ｖ）と有機ヒ素の分別定量
  • 水酸化ランタン共沈分離/還元蒸留/黒鉛炉原子吸光法による高塩濃度廃水中の無機ヒ素(3,5)と有機ヒ素の分別定量
  • スイサンカ ランタン キョウチン ブンリ カンゲン ジョウリュウ コクエン ロ ゲンシ キュウコウホウ ニ ヨル コウエン ノウド ハイスイ チュウ ノ ムキ ヒソ 3 5 ト ユウキ ヒソ ノ フンベツ テイリョウ

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Abstract

The selective determination of inorganic arsenic(III, V) and total organic arsenic in high salts wastewater by graphite-furnace AAS has been developed. The selective separation of inorganic arsenic in the presence of dimethylarsinic acid, monomethylarsonic acid and p-aminophenylarsonic acid was achieved by lanthanum hydroxide coprecipitation at pH 12 or more. Organic arsenic compounds were distilled as chloroarsine compounds by reductive distillation using tin(II) chloride under 2.75 M H2SO4 and 4 M HCl. The developed method was satisfactorily applied to real high salts wastewater. The detection limits(3σ) were 0.3 μg dm-3 for inorganic arsenic and 2.3 μg dm-3 for organic arsenic.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 50 (3), 187-192, 2001

    The Japan Society for Analytical Chemistry

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