Determination of Manganese in Iron, Steel and Ferromanganese. I : Determination of Manganese in Iron and Steel
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概要
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The suitable concentration of acids and other conditions in ferrous-permanganate method after the oxidation with persulfate were studied for the determination of manganese in Iron and steel and the following results were obtained : (1) Acid concentration : using 2 g of ammonium persulfate in total volume of 200 mL, manganese was determined in the concentration range 1.2〜2.4 N sulfuric acid, 0.53〜1.20 N nitric acid and 0.6〜1.2 N mixed acid of sulfuric acid and nitric acid (3 : 1) but manganese could not be determined in acidic solution with perchloric acid. (2) Boiling time : the time of boiling of the solution for the oxidation of manganese by ammonium persulfate using silver nitrate was 5 min, during which the decomposition of permanganic acid occurred. (3) Influence of phosphoric acid : when 1g of iron and 10mg of manganese were present, the existence of 4 ml of phosphoric acid (sp. gr. 1.7) was advisable. (4) The suitable procedure for the determination of manganese in iron and steel was established and the analysis was carried out with several samples and reliable results were obtained.
- 東北大学の論文
著者
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Goto Hidehiro
The Research Institute For Iron Steel And Other Metal S
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Watanabe Shiro
The Research Institute For Iron Steel And Other Metals
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Goto Hidehiro
The Research Institute For Iron Steel And Other Metal
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