塩基性鋼滓中の酸化第1鉄,酸化第2鉄および酸化チタンの定量

塩基性鋼滓の化学分析法の研究-II

抄録

This investigation was undertaken to find rapid and accurate chemical methods for the analysis of basic slag. In the report (II), a simple spectrophotometric or volumetric methods is described for determination of FeO, Fe₂O₃ and TiO₂ which are contained in basic slag.
Determination of Fe₂O₃: Dissolve the sample with HCl, and dilute to about 100ml. with water. Adjust to pH 2.0 with ammonium acetate, and titrate with EDTA using salicylic acid as an indicator. Determination of FeO: In the same solution, add NH₄S₂O₈. Mix and titrate with EDTA.
Determination of TiO₂: A simple and selective procedure has been developed for the spectro photometric determination of TiO₂ in the presence of other metals by using EDTA and salicylic acid.
The reaction between Ti and salicylic acid at pH 4-5 to produce the yellow colored-complex was chosen for application. At pH 4-5 Mo, Nb, Th, Mn, Al, Pb, Ca and Mg do not interfere. Fe, Cu, Cr and V may be masked by the addition of EDTA.