イオン交換樹脂を用いた珪酸塩分析法
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概要
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A systematic analysis of silicates has been investigated in which the elements to be estimated-Na, K, Mg, Ca, Mn, Al, P, and total Fe-are separated out by the use of ion-exchange resins, without any other separatory operation. About 100 mg sample in conc HCl is passed through an anion exchanger. The resin is eluted with 10.5 <I>N</I> HCl to obtain an effluent containing Na, K, Mg, Ca, and Al; and this is followed by eluting with 6 <I>N</I> HCl to obtain an effluent containing Mn, Ti, and P, and finally with 0.5 <I>N</I>HCl for the liberation of the Fe. The first effluent is passed through a cation exchanger, Na and K are liberated with dil HCl, and Ca and Mg are separated from Al by the use of NH<SUB>4</SUB> acetate solution. Mn and Ti are separated from P by the use of a cation exchanger and the separation of Mn from Ti is made with H<SUB>2</SUB>SO<SUB>4</SUB>. The estimations are carried out by titration or the colorimetric method, except for Al. Practical application of the above method on analyses of several silicate rocks gave fairly satisfactory results.
- 社団法人 日本分析化学会の論文