Selective lanthanum ions optical sensor based on covalent immobilization of 4-hydroxysalophen on a hydrolyzed triacetylcellulose membrane

Authors: Ali A Ensafi, E Fooladgar

Publication date: 2011/9/1

Journal name: Journal of Analytical Chemistry

Volume: 66

Issue: 9

Pages: 865-870

Publisher: SP MAIK Nauka/Interperiodica

Abstract An optical sensor membrane is described for the determination of lanthanum (III)
ions based on the immobilization of 4-hydroxysalophen on a hydrolyzed triacetylcellulose
membrane. 4-Hydroxysalophen is covalently bonded to a transparent hydrolyzed
triacetylcellulose film. The sensing membrane in contact with lanthanum ions at pH 4.0
changes color from white-yellow to orange (323 to 433 nm). Under the optimum conditions,
the proposed membrane displayed a linear range from 1.0× 10− 6 to 1.0× 10− 2 M La (III) ...