Abstract
New synthetic hydrogen ion-selective carriers, derivatives of dibenzylamine, have been used as neutral carriers in liquid membrane electrodes to measure pH range from 2 to 10. A H +-selective membrane electrode based on octyldibenzylamine gave a better linear response to pH than other alkyldibenzylamines as neutral carriers. It gave a linear response over the pH range 2–10 and a slope of 56.5 mV/pH at 20°C. The electrode had fairly low electrical resistance, good potential stability and reproducibility. The selectivity coefficients towards sodium, potassium and calcium ions as well as other characteristics of the membrane electrode have been studied.
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