無機態ヒ素及びメチル化ヒ素のベンゼンによる抽出

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概要

• 論文の詳細を見る

• Inorganic arsenic (arsenite and arsenate), disodium methanearsonate (DSMA) and dimethylarsinic acid (DMAA) were extracted into benzene from the hydrochloric acid medium with or without potassium iodide. The extractability was estimated by determining the arsenic, after transferring it from benzene into water by back-extraction, with an atomic absorption spectrophotometer equipped with a graphite furnace atomizer. Inorganic As(III) was the only species extracted with benzene alone although the extraction was not complete. Above (5〜6) M in hydrochloric acid containing potassium iodide (0.5 M), essentially 100 % of both As(III) and As(V) were extracted. Ion-exchange chromatography, thin-layer chromatography and molybdenum blue formation reaction revealed that the greater part of As(III) and As(V) were extracted as As(V) in the presence of potassium iodide. Essentially 100 % of DSMA was extracted from the hydrochloric acid {(3〜9.6) M} containing potassium iodide (0.5 M). A maximum extraction of DMAA was achieved from the (7〜8) M hydrochloric acid medium containing potassium iodide (0.1 M or 0.5 M). The percent extraction, however, did not exceed ca. 90 %. Although the distribution ratio of DMAA between the benzene and aqueous (7 M hydrochloric acid, 0.5 M potassium iodide) phases was about 10, those of other three arsenicals were of the order of nearly 10^2. This procedure was useful for separation and purification of water-soluble arsenic compounds present in the extract of a brown seaweed, Hizikia fusiforme.

• 社団法人日本分析化学会の論文
• 1980-08-05

著者

• 田川 昭治

  水産大学校

• 田川 昭治

  水産大

関連論文

• 強酸性陽イオン交換樹脂によるヒ素(III),ヒ素(V),メタンアルソン酸塩及びジメチルアルシン酸の分画
• 無機態ヒ素及びメチル化ヒ素のベンゼンによる抽出
• カツオおよびビンナガの濃縮エキス中のアルセノベタインの単離と同定
• アオザメおよびヨゴレザメの普通筋における水溶性ヒ素化合物としてのアルセノベタインの単離と同定〔英文〕
• ヒジキにヒ素(5),ヒ素(3),メチルアルソン酸塩およびジメチルアルシン酸塩の確認

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