Utilização de um eletrodo de grafite-epóxi recoberto com [Zn(FEN)3][tetratris(4-clorofenil) borato]2 sensível a zinco(II) em meio 1,10-fenantrolina como eletrodo indicador em titulações potenciométricas de precipitação

Abstract

-5 to 1.0 x 10 -3 mol L -1 in 1,10-phenantroline medium, at pH 6.0. The response time was less than 20 seconds and the lifetime of this electrode was more than four months (over 1200 determinations by each polymeric membrane). It was successfully used as an indicator electrode in the potentiometric precipitation titration of zinc(II) ions.

Zn(II)‐Selective Membrane Electrode Based on Tetraazamacrocycle [Bzo2Me2Ph2(16)hexaeneN4]

“…A sulipride drug [32], bis(2-nitrophenyl)disulfide [33] and thiazolidin-4-one derivative [34] have also been explored as ionophore in the construction of ion-selective electrodes for Zn(II) ions. Recently, liquid membrane electrodes [35,36] and coated graphite [37] Zn(II) ion-selective electrodes have also been reported. These reported ISEs suffer from one or the other limitation viz.…”

“…These reported ISEs suffer from one or the other limitation viz. narrow working concentration range [4,24 -26, 28 -37], low pH range [27,37] and high response time [29,37]. Therefore, there is a need for developing a better sensor for zinc ions.…”