Resumo

ARADA, María de los Ángeles; VICENTE LUIS, Santiago; ALTAVA, Belén  e  GALINDO, Francisco. Construction and evaluation of chloride ion-selective electrodes. Rev Cub Quim [online]. 2015, vol.27, n.2, pp. 119-130. ISSN 2224-5421.

In this paper we report a chloride ion-selective PVC membrane, using bis (2-ethylhexyl) sebacate (DOS) as plasticizer and 2-(5-(4-nitrophenyl)furyl)-4,5-diphenyl imidazole (FFDFIN) as ionosphere. The constructed electrodes showed a fast potentiometric response to chloride in the concentration range from 0^-6 to 10^-2 mol . dm³ with Nernstian slopes. In the case of electrodes prepared containing 1 and 3 wt % of the ionosphere, the lifetime of the sensor was estimated to be about 6-7 days. The lifetime of the sensor containing 7 w t % of ionosphere was about 15-18 days. The electrode containing 7 w t % of ionosphere was applied as an indicator electrode in the potentiometric titration of silver ions with NaCl.

Palavras-chave : chloride ion-selective PVC membrane; ion-selective electrode (ISE); 2-(5-(4-nitrofenyl) furyl)-4,5-difenyl imidazole; chemical sensor.

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