Authors: Ali A Ensafi, A Katiraei Far, S Meghdadi

Publication date: 2009/12/30

Journal name: Journal of hazardous materials

Volume: 172

Pages: 1069-1075

Publisher: Elsevier

An optical sensor is described for a sensitive and selective spectrophotometric
determination of Pb (II) ions in aqueous solution. A sensor membrane based on 4-hydroxy
salophen has been developed for the determination of Pb (II) ions that displays excellent
performance. The membrane responds to lead (II) ions, giving a color change from colorless
to yellow in a buffer solution (pH 3.1). The optode has a linear range of 1.0× 10− 3–1.0× 10−
7molL− 1 Pb (II) ions with a detection limit of 8.6× 10− 8molL− 1 Pb (II). The response time ...