黒鉛炉原子吸光分析法による鉄鋼中微量酸可溶性アルミニウムの定量

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タイトル別名
  • Determination of trace amounts of acid soluble aluminium in iron and steel by graphite furnace AAS.
  • コクエンロ ゲンシ キュウコウ ブンセキホウ ニ ヨル テッコウチュウ ビリョ

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抄録

Determination of trace amounts of acid soluble aluminium in iron and steel by graphite furnace AAS was studied. In order to avoid interferences encountered in practical analysis, the following analytical conditions were employed. (1) sulfuric acid was used for the sample decomposition. (2) pyrolitically coated graphite tubes were used as furnaces. (3) as a matrix modifier magnesium sulfate was added to sample solutions. (4) ramp mode heating (13002000°C, 30 s) was performed at the ashing step. The proposed method was applied to the determination of aluminium in iron solution. The relative standard deviations obtained with the present conditions were less than 7% (concentrations of aluminium were in the range of 00.05 mg/l) and the detection limits (3σ) were 0.75 μg/l. Interferences from manganese and silicon were almost negligible when concentration of manganese was 50 mg/l and that of silicon was 25 mg/l. This method was applied to the determination of acid soluble aluminium in carbon steel with satisfactory results.

収録刊行物

  • 分析化学

    分析化学 39 (3), 171-175, 1990

    公益社団法人 日本分析化学会

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