銅イオン電極およびカドミウムイオン電極を用いる銅またはカドミウムイオンとコバルト, ニッケルおよび亜鉛イオンの分別滴定

概要

論文の詳細を見る
Cu(II), Cd(II), Co(II), Ni(II) or Zn(II) in hexamine-hydrochloric acid buffer at about pH6.5 can be titrated potentiometrically using Orion cupric ion indicator electrode with 0.01M EDTA, and the accuracy of the measurement is about one per cent. The e. m. f. change at the titration of Cu(II) using cadmium ion electrode is very large, and the value is twice at that of divalent ion. It can be assumed that Cu(II) in the solution will probably change the Ag(I) in the membrane (Ag_2S-CdS). The mixture of Cu(II) and Zn(II) is differentially titrated with 0.01M EDTA using cupric ion electrode, if the ion-strength of the solution is lower than 0.02. And the total mole of Cu(II) and Zn(II) is determined with EDTA titration in the presence of oxycarboxylic acid-namely, tartaric, salicylic or citric acid at about pH10. And Cu(II) in the mixture is titrated with EDDP separately.
共立薬科大学の論文
1979-02-25