CyDTAを用いるチタン含有合金中のチタンのポーラログラフ定量

概要

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In diluted sulfuric acid solution containing 1, 2-cyclohexanediaminetetraacetic acid (CyDTA) as chelating agent, the cathodic reduction of titanium(IV) occurs at about-0.1V (vs. S.C.E.). Its half wave potential depends on pH value of the supporting electrolyte solution. Optimum conditions for determining titanium in nickel, copper and iron-chromium-aluminum alloys by using this reduction wave together with the interfering substances were studied. In the recommended procedure, 5 mM of CyDTA solution is added to the sample solution containing 0.22.6 mg of titanium, pH is controlled to 2.0 and the polarogram is recorded between 0 and-0.6 V (vs. Hg pool). The reproducibilities represented by relative standard deviation are 1.96% for the titanium in nickel, . 3.17% for titanium in copper, and 2.56% for titanium in iron-chromium-aluminum alloys. Cu2+, Fe3+, WoO42-, MoO42-, UO22+, PO43-, F-, I-, H2O2, citrate and tartrate interfere.
社団法人日本分析化学会の論文