5-オクチルオキシメチル-8-キノリノールを用いた銅(II) : イオン選択性電極の開発

概要

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Cupric ion selective membrane was prepared by using Cu (5-octyl oxymethyl-8-quinolinol)_2 as ion-sensing material, diocytl phenyl phosphonate (DOPP) as the solvent mediator and PVC as the membrane matrix. A linear log α_<Cu>-potential curve was obtained within the cupric ion activity range from 8×10^<-6> to 10^<-1> mol dm^<-3> : the slope was 35 mV decade^<-1> when the ISE membrane was composed of 5 mg of cupric ion-sensing matrial, 250 mg of DOPP and 50 mg of PVC. The ISE exhibited a constant potential within the pH range from 2.8 to 5.2. The selectivity coefficients of the ISE for Zn^<2+>, Mg^<2+> and Ni^<2+> were one several thousandths compared with those of the ISE which was made of Cu (8-quinolinol)_2 as the cupric sensitive matrial. These effects should be ascribed to the steric effect of 5-octyl oxymethyl of the ion-sensing martial.
社団法人日本分析化学会の論文
1992-03-05