イオン交換分離-反応速度法によるタンタル、ニオブ中の極微量マンガンの定量

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タイトル別名
  • イオン交換分離‐反応速度法によるタンタル，ニオブ中の極微量マンガンの定量
  • Determination of trace manganese in tantalum and niobium metals by a combination of ion exchange and kinetic method
  • イオン コウカン ブンリ ハンノウ ソクドホウ ニヨル タンタル ニオブチュウ

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説明

A simple and sensitive method has been developed for the determination of trace amounts of manganese in tantalum and niobium metals.<BR>The method is based on the separation and concentration of manganese by ion exchange adsorption on cation exchange resin from HF-HNO3 media followed by the kinetic determination of manganese.<BR>Sample was dissolved in 5 ml of HF(1+1) and 2 ml of HNO3(1+1) in a polyethylene beaker with gentle heating, and the solution was diluted to about 50 ml with water. This sample solution was passed through an ion exchange column {Amberlite CG-120, H-form, (100200)mesh, 10 mm in diam. × 50 mm} at the flow rate(12)ml/min. The column was washed with 30 ml of wash solution {mixture of 5 ml of HF(1+1) and 2ml of HNO3(1+1) was diluted with water to about 50 ml}, then with 20 ml of water. The adsorbed manganese was eluted with 15 ml of HCl(1+1). The effluent containing manganese was collected in a glass beaker and evaporated to moist dryness without baking. The residue was dissolved in water and transfered to a 50 ml volumetric flask. A 10 ml aliquot of this solution was taken into a test tube with a ground glass stopper.<BR>Then manganese was determined by the kinetic method described in previous paper51. The proposed method allows the determination of manganese as low as 0.05 ppm for 1-gram sample.

収録刊行物

  • 分析化学

    分析化学 24 (2), 120-124, 1975

    公益社団法人 日本分析化学会

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