過塩素酸分解による鉄鋼中マンガンの吸光光度定量法

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タイトル別名
  • Spectrophotometric Determination of Manganese in Iron and Steel by Decomposition with Perchloric Acid.
  • カエンソサン ブンカイ ニ ヨル テッコウ チュウ マンガン ノ キュウコウ コウド テイリョウホウ

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説明

As a spectrophotometric method of manganese in iron and steel the (NH4)2S2O8 method has been mainly adopted.In this method, the sample is decomposed by a mixture of nitric acid, sulphuric acid and, phosphoric acid.<BR>The authors studied the (NH4) 2S2O8 method using perchloric acidic solution which decomposed the sample. It is said that conversion of Mn+2 into Mn+7 by only perchloric acidic solution is commonly unstable.<BR>After studying all kinds of method, authors found this method to be good as far as the amount of perchloric acid in this colored solution is 2 to 10ml.<BR>The features of this method are as follows:<BR>(1) The sample solution is easily converted into Mn+7 from Mn+2 by heating in the boiling bath for only 2 to 3 minutes.<BR>(2) Sufficient addition of color reagent is AgNO3 solution (0.5%) 10ml.and (NH4)2S2O8 solution (15%) 10ml.and a color develops rapidly.<BR>(3) Color of Mn+7 is stable for a day.<BR>(4) The sample containing a large amount of nickel, chromium and cobalt can easily be determined, too.

収録刊行物

  • 鉄と鋼

    鉄と鋼 50 (2), 188-195, 1964

    一般社団法人 日本鉄鋼協会

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