Authors: Ali A Ensafi, Masoud Fouladgar

Publication date: 2009/4

Journal name: Sensor Letters

Volume: 7

Pages: 177-184

Publisher: American Scientific Publishers

Abstract: A sensitive reversible optical chemical sensor for detecting lead ions is described.
The sensor is based on the interaction of Pb (II) with diphenylcarbazone in plasticized PVC
membrane incorporating a plasticizer (tributylphosphate). The membranes were cast onto
glass substrates and used for the determination of lead ions in aqueous solutions by batch
and flow-through methods. When the sensing film came in contact with lead (II) ions at pH
6.0, its color changed from pale orange to pink. Parameters affecting the optode response ...