Development of a Novel Solid-State Sensor Electrode Based on Titanium Thin Film as an Indicator Electrode in Potentiometric and Conductometric Acid-Base Titration in Aqueous Solution

Nasser Abu Ghalwa

doi:10.1155/2012/681826

Abstract

A modified Ti/(SnO2+ Sb2O3) electrode was prepared by thermal deposition on titanium substrate and its use as indicator electrode to potentiometric and conductometric acid-base titration in aqueous solution at 298 K was developed. The E-pH curve is linear with slope of 0.0512 V/dec at 298 K. The standard potential of this electrode,E0, was determined with respect to the SCE as reference electrode. The recovery percentages for potentiometric and conductometric acid-base titration for acetic acid against NaOH were calculated. The cell constant, specific conductance, and the molar conductance with dilution for some common electrolytes were measured.

Highlights

IntroductionProton sensitive metal oxides seem to be promising alternatives to the state-of-the-art measuring methods and might overcome some problems of classical hydrogen electrodes and reference electrodes [1]
Proton sensitive metal oxides seem to be promising alternatives to the state-of-the-art measuring methods and might overcome some problems of classical hydrogen electrodes and reference electrodes [1].Metal oxide electrodes are becoming alternatives to glass electrodes
Many potentiometric methods developed for measuring the acidity and basicity for aqueous solutions under different conditions were reported [3]

Summary

Introduction

Proton sensitive metal oxides seem to be promising alternatives to the state-of-the-art measuring methods and might overcome some problems of classical hydrogen electrodes and reference electrodes [1]. Metal oxide electrodes are becoming alternatives to glass electrodes. They, can be used as acid-base indicator electrodes. In extreme acidic and basic conditions of the pH scale, great deviations of the Nernstian behavior are observed [2]. Many potentiometric methods developed for measuring the acidity and basicity for aqueous solutions under different conditions were reported [3]. Different metal/metal oxide electrodes have been used as acid-base indicator electrodes. The most frequently used are the antimony, niobium, copper, tantalum, stainless steel, iridium, and tungsten electrodes [4,5,6]

Methods

Results

Conclusion