鉄鋼中のタングステンの光度定量法

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タイトル別名
  • Photometric Determination of Tungsten in Iron and Steel. (Studies on Extraction and Determination of Metal Salts with Methyl Isobutyl Ketone, VII)
  • テッコウ チュウ ノ タングステン ノ コウド テイリョウホウ

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Studies were carried out on the photometric determination of microamount of W in iron and steel. W and Mo were separated from the main component of Fe and other elements by α-benzoinoxime-chloroform extraction. When larger amount of Mo was present than that of W in the sample, most of Mo in HCl solution was separated from W by methyl isobutyl ketone extraction. After reducing W6+ to pentavalent W with SnCl2 in HCl solution, thiocyanate complex of W was formed by addition of NH4SCN. The complex was extracted with methyl isobutyl ketone and the amount of W was determined by measuring its light absorbancy. When V was not contained in the sample, W was separated from Fe and other elements by precipitating their hydroxides with NaOH in the place of α-benzoinoxime-chloroform extraction method.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 25 (3), 184-188, 1961

    公益社団法人 日本金属学会

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