イオン選択性ガラス電極の陽イオンに対する過渡応答性

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Dynamic responses of ion selective glass electrodes have been studied when they are subjected to sudden change of cation concentrations. Ion selective glass electrodes used were Orion 94-11A and an electrode of domestic product either having the same glass composition as Corning NAS 11-18 which is so-called sodium selective electrode, Corning NAS 27-4 characterized by its high selectivity to K^+ and Corning 476024, a conventional pH glass electrode. The experimental method is the same as described in the previous paper. Both the Orion 94-11A and the domestic product indicated similar characteristic patterns of the transient responses to K^+ and Ba^<2+> as in the case of Corning NAS 11-18, that is, the electrodes rapidly developed overshoot potentials which were then restored towards their equilibrium levels. Orion 94-11A, however, restored the transient response somewhat faster than in the case of Corning NAS 11-18. The Domestic one exhibited much larger potential change than the other electrodes and was considerably responsive to K^+ as the steady-state potential, although initial transient response almost disappeared with time in the case of Ba^<2+>. The electrode potential of Corning NAS 27-4 moved towards one side direction for K^+ and Ba^<2+> without development of the transient potential. Corning 476024 also developed the transien tresponse to Na^+ in the background solution of 0.01 M diisopropylamine (pH 11.5), but it disappeared quickly within a short period.
社団法人日本分析化学会の論文
1976-08-10

イオン選択性ガラス電極の陽イオンに対する過渡応答性

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