アルシン-原子吸光法による微量ヒ素定量における湿式分解法の食品試料への適用

DOI NDLデジタルコレクション Web Site Web Site

書誌事項

タイトル別名
  • アルシン‐原子吸光法による微量ひ素定量における湿式分解法の食品試料への適用
  • Adaptability of wet decomposition method to food samples for the determination of arsenic by arsine generation-atomic absorption spectrophotometry
  • アルシン ゲンシ キュウコウホウ ニヨル ビリョウ ヒソ テイリョウ ニ オケ

この論文をさがす

抄録

A simple and rapid wet decomposition method with nitric, sulfuric, and perchloric acids was adapted to various food samples. The procedure is as follows: (0.252.5)g (dry weight) of food and 10ml of concentrated nitric acid are taken into a 100ml bolosilicate glass beaker (arsenic free) and mixed thoroughly. The mixture is heated gently on hot plate-sand bath at (170220)°C covered with a bolosilicate glass watch dish (arsenic free). After subsidence of the sample foaming, the pre-decomposed mixture is cooled and 3ml of concentrated nitric acid, 2.5ml of concentrated sulfuric acid and 5ml of perchloric acid (60%) are added. The mixture is heated strongly on hot platesand bath at (300380)°C to steady boiling. If slight charring occurs, analysis loss can be prevented by immediate addition of a small amount of concentrated nitric acid. Perchloric acid is boiled off and residual sulfuric acid is concentrated to less than 1ml. The residue is washed into a 25 or 50ml volumetric flask with 3N hydrochloric acid after cooling. Arsenic is then determined by arsine generation-atomic absorption spectrophotometry. It takes (1.52.0) hrs to accomplish the decomposition. Recoveries of inorganic arsenic (arsenic trioxide) or organic (p-arsanilic acid) added to various foods were (93105) %. It was suggested that recovery of arsenic was independent of matrix of food, form of arsenic and presence of large amount of sodium chloride. Precision was (58) % R.S.D. at 0.1μg arsenic trioxide and (14)% at 0.4μg. Analysis of NBS standard reference material (orchard leaves) for arsenic by this method showed a good agreement with certified value. This decomposition method would be adaptable to the determination of arsenic in almost all kinds of foods.

収録刊行物

  • 分析化学

    分析化学 26 (12), 809-814, 1977

    公益社団法人 日本分析化学会

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ