電熱材中のコバルトおよび鉄の光度定量法

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タイトル別名
  • Photometric Determination of Iron and Cobalt in Electrical Heating Alloys. (Studies on Extraction and Determination of Metal Salts with Methyl Isobutyl Ketone, IX)
  • デンネツザイ チュウ ノ コバルト オヨビ テツ ノ コウド テイリョウホウ

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抄録

After dissolving iron-chromium electrical heating alloy sample, most amount of Fe and Cr was separated from the solution by extracting it with methyl isobutyl ketone and then the residual ferric iron in the aqueous phase was reduced to ferrous iron with SnCl2. Co thiocyanate was extracted with methyl isobutyl ketone and the amount of Co was determined by measuring its absorbancy without any influence of small amount of Fe. In the case of nickel-chromium electrical heating alloy, most amount of Cr was volatilized by heating the sample solution to fumes of HClO4. Then, Co and Fe thiocyanates were extracted with methyl isobutyl ketone and simultaneous determination of both elements was carried out photometrically. By this method, 0.5∼0.001% of Co was easily determined. Samples containing over 0.01% of Co and Fe less than a half amount of Co are suitable for simultaneous determination of Co and Fe by this method.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 25 (8), 527-530, 1961

    公益社団法人 日本金属学会

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