Highly selective iodide membrane electrode based on a cerium salen.
A highly selective PVC membrane electrode based on a cerium-salen complex was prepared. The sensor displays an anti-Hofmeister selectivity sequence with a preference for iodide ion over many common organic and inorganic anions. The proposed electrode exhibits a near-Nernstian behavior over a wide concentration range (5.0 x 10(-2) - 8.0 x 10(-6) M) with a slope of 57.5 mV per decade, and a detection limit of 6.0 x 10(-6) M. The electrode has a very fast response time and can be used in the pH range of 3.0 - 1 1.0. It was applied, as an indicator electrode, in potentiometric titration of Ag+ ions.
Ganjali
Mohammad Reza
MR
Department of Chemistry, Tehran University, Iran. Ganjali@khayam.ut.ac.ir
Poursaberi
Tahereh
T
Hosseini
Morteza
M
Salavati-Niasary
Masoud
M
Yousefi
Mohammad
M
Shamsipur
Mojtaba
M