2,6-ジアセチルピリジンジオキシムによる微量の鉄(II)の吸光光度定量

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タイトル別名
  • ２，６‐ジアセチルピリジンジオキシムによる微量の鉄（ＩＩ）の吸光光度定量
  • Spectrophotometric determination of minute amounts of iron(II) with 2, 6-diacetylpyridinedioxime
  • 2 6 ジセチルピリジンジオキシム ニヨル ビリョウ ノ テツ 2 ノ キュウ

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抄録

Iron(II) reacts with 2, 6-diacetylpyridinedioxime (abbreviated as DAPD) in alkaline medium to form a red color complex. The complex has an absorption maximum at 485 nm and shows a constant absorbance against a reagent blank in the alkaline solution of pH 12.5 or above. The calibration curve obeys Beer's law over the concentration range from 0.2 to 7 μg/ml of iron(II) at 485 nm. The molar absorption coefficient of complex is 1.16×104 cm-1 mol-1l. The combining ratio of iron and DAPD in the complex was estimated to be 1:2 by the analytical results of isolated complex and the continuous variation method. The analytical procedure is as follows; To a sample solution containing iron(II), 5 ml of 5×10-3 mol DAPD 50% ethanol solution (containing 1.4 mol hydroxylamine) and 5 ml of 2 N sodium hydroxide solution were added, and the resulted solution was heated gently to boil. After cooling the solution to room temperature under flowing tap water, the solution was transfered to a 50 ml volumetric flask and diluted to the mark with water. The absorbance of the complex was measured at 485 nm against blank solution. The method was applied to the determination of iron in sodium hydroxide, and the analytical result agreed well with 1, 10-phenanthroline method.

収録刊行物

  • 分析化学

    分析化学 28 (2), 73-77, 1979

    公益社団法人 日本分析化学会

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