キュープリゾンによる鉄鋼および鉱石中の銅迅速定量法

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  • Rapid Determination of Copper in Iron, Steel and Ores with Cuprizone (Biscyclohexanone Oxalyldihydrazone)
  • キュープリゾン ニ ヨル テッコウ オヨビ コウセキ チュウ ノ ドウ ジンソク テイリョウホウ

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Cuprizone reacts selectively with Cu at a pH 8.0∼9.5 and forms complex salts having the maximum absorbance in the proximity of 600 mμ. When Fe is masked with citric acid while Cr is oxidized Cr (VI), the coloration is not affected. This method cannot be applied to the steel containing a quarlity of nickel (II) or a little Co (II) as such material has a nature to interfere coloration increasing fugitive color. But the method is applicable to steel containing up to 0.5%Co and 10%Ni where the sample taken is reduced and the amount of cuprizone is increased. Where the pH value is well controlled at the time of coloration, any kind of decomposing acid can be applied. When Fe coexists in the sample, the color remains unchanged for some 3∼20 minutes after the addition of cuprizone. The time required for determination will be shortened by this method as the extraction by organic reagents can be omitted. Satisfactory results have been obtained by applying this method to determination of Cu in iron, steel and ores.

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  • 日本金属学会誌

    日本金属学会誌 23 (11), 641-644, 1959

    公益社団法人 日本金属学会

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