鉄鋼およびフェロマンガン中のマンガンの定量法について（第2報）フェロマンガン中のマンガンの定量法

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タイトル別名
  • Determination of Manganese in Iron, Steel and Ferromanganese (2nd Report). Determination of Manganese in Ferromanganese

抄録

The suitable concentration of acids and other conditions in ferrous-permanganate method after oxidation with persulfate for determination of Mn in ferromanganese were studied and the following results were obtained. (1) Acid concentration; Using 4 g of (NH4)2S2O8 in total volume 400 mL, Mn of 4∼28 mg was determined in the concentration range of 1.4∼2.6 N H2SO4, 0.6∼1.0 N mixed acid of H2SO4 and HNO3 (3:1). (2) Boiling time; The time of boiling of the solution for oxidation of Mn by (NH4)2S2O8 using AgNO3 was permitted till 5 min after decomposition of surplus persulfate. In above acid concentration, boiling for more than 6 min caused the decomposition of permanganic acid. (3) Influence of H3PO4; Using about 2 g of (NH4)2S2O8 in total volume of 200 mL, the amounts of H3PO4 added must be increased with the increase of Mn content. But when the total volume is made to 400 mL and 4 g of (NH4)2S2O8 are used, the addition of too much of H3PO4 would be useless. (4) The suitable procedure for the determination of Mn in ferromanganese was established and the analysis were carried out with several samples, and good results were obtained.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 17 (4), 194-197, 1953

    公益社団法人 日本金属学会

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