吸光光度法による金属ニッケルおよびフェロニッケル中のコバルトの迅速定量

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  • 榊 隆
    日本特殊鋼株式会社研究所

書誌事項

タイトル別名
  • On the Rapid Determination of Cobalt in Metallic Nickel and Ferro-Nickel by the Spectrophotometric Method
  • キュウコウ コウドホウ ニ ヨル キンゾク ニッケル オヨビ フェロニッケル チュウ ノ コバルト ノ ジンソク テイリョウ

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抄録

An experiment was conducted on the photometric method with sodium diethyl dithio carbamate, for the purpose of establishing a rapid and accurate determining method for obtaining the amount of cobalt in metallic nickel and ferro-nickel. When cobalt coexists with EDTA in the sample solution, the complex salt of cobalt diethyl dithio carbamate will form quantitatively in an acetic acid solution of pH 3.0∼3.7. This complex salt can be extracted quantitatively and readily by the use of carbon tetra chloride. This extracted solution has an absorption maximun at 365 milli microns. However, since the maximum absorption of the blank solution is also in the same wave length range, it will be suitable to use a wave length of about 390 milli microns where the absorption of the blank solution is comparatively small. At pH 3.0∼3.7, the effect of copper, bismuth, certain irons, nickel and manganese which can not be masked by EDTA, can be eliminated by the use of mercuric acetate.<BR>As a result of the experiment, the author was able to establish a method in which 0.02 to 2 per cent of cobalt can be measured quantitatively and accurately in about fifteen minutes. The amount of cobalt in actual samples was measured by this method, and satisfactory results were obtained.

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  • 日本金属学会誌

    日本金属学会誌 27 (9), 445-449, 1963

    公益社団法人 日本金属学会

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