Fabrication of a membrane Electrode by using bis (5-phenylazosalicylaldehyde)-1, 2-benzenediimine

Abstract

A membrane electrode that has a specific response for a particular ion is known as an ion-selective electrode. Membrane electrodes are used to determine the concentration of ions. Fabrication of an ISE that has a rapid, sensitive, and accurate response was the objective of this work. In this work, a membrane electrode based on bis (5-phenylazosalicylaldehyde)-1, 2-benzenediimine) and DES was constructed. The membrane electrode exhibited a linear response to the concentration of Pb2+ within the interval of 6.7×10–6 – 5.0×10-3 with a slope of 35.5mV per decade and the appropriate pH was 3.5-5.0. The response time was 9 sec and the detection limit was 3.3×10 -6M. The proposed Pb2+ membrane sensor was used for complexometric titration of Pb2+ ion. The results were accurate and this electrode was used to determine Pb2+ in real samples.