鋳鉄および銑鉄中の微量亜鉛の定量

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書誌事項

タイトル別名
  • Determination of traces zinc in cast iron and pig iron
  • チュウテツ オヨビ センテツ チュウ ノ ビリョウ アエン ノ テイリョウ
  • Studies on the techno-analytical method by means of S. W. polarograph III
  • 矩形波ポーラログラフによる分析方法の研究(第3報)

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抄録

A method of determination of a trace amount of zinc in cast iron and pig iron was presented, in which zinc was polarographically determined in hydrochloric acid, after the disturbing iron as a main component was removed by the extraction with MIBK and other coexisting elemnts, copper, nickel, chromiun, etc., were separated by use of the anion exchanger.<BR>The sample (1g) in a conical beaker was dissolved in a solution composed of 10ml perchloric acid, 4ml. nitric acid, and 15ml water, the heating was continued until the evolution of white fume became vigorous, the residue was dissolved in conc. hydrochloric acid and the solution was transferred into a separatory funnel together with 6N hydrochloric acid washings of the beaker. This was shaken with 30ml MIBK for extraction of iron. The aqueous layer was transferred into another separatory funnel and the rest of iron was extracted with 30ml MIBK.<BR>The aqueous layer was taken into a 100ml beaker and it was evaporated almost to dryness with heating. The residue was taken up in 10ml 2N hydrochloric acid, passed through an anion exchange column Amberlite IRA 400 (6φ×50mm) and washed with 30ml 2N hydrochloric acid. The zinc was liberated by passing 30ml water and the effluent was collected into a 50ml measuring flask. This was treated with 10ml. 6N hydrochloric acid and made up to the mark with water. An aliquot was taken into an electrolytic bottle, nitrogen was passed through for driving off oxygen and the polarogram from -0.8 to-1.1V was taken.<BR>0.0010.01% of zinc in cast iron or pig iron was determined by this procedure.

収録刊行物

  • 分析化学

    分析化学 11 (1), 69-73, 1962

    公益社団法人 日本分析化学会

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