title: Cobalt(II)-selective membrane electrode based on a recently synthesized benzo-substituted macrocyclic diamide.
abstract: A PVC-membrane electrode based on a recently synthesized 18-membered macrocyclic diamide is presented. The electrode reveals a Nernstian potentiometric response for Co2+ over a wide concentration range (2.0 x 10(-6)-1.0 x 10(-2) M). The electrode has a response time of about 10 s and can be used for at least 2 months without any divergence. The proposed sensor revealed very good selectivities for Co2+ over a wide variety of other metal ions, and could be used over a wide pH range (3.0-8.0). The detection limit of the sensor is 6.0 x 10(-7) M. It was successfully applied to the direct determination and potentiometric titration of cobalt ion.
authors.affiliation: Department of Chemistry, Razi University, Kermanshah, Iran.
authors.forename: M
authors.initials: M
authors.lastname: Shamsipur
authors.forename: T
authors.initials: T
authors.lastname: Poursaberi
authors.forename: S
authors.initials: S
authors.lastname: Rouhani
authors.forename: K
authors.initials: K
authors.lastname: Niknam
authors.forename: H
authors.initials: H
authors.lastname: Sharghi
authors.forename: M R
authors.initials: MR
authors.lastname: Ganjali
mesh_terms: D000577:Amides / Q000737:chemistry; D003035:Cobalt / Q000032:analysis*; D004566:Electrodes; D055590:Electromagnetic Phenomena; D007202:Indicators and Reagents; D007476:Ionophores; D008567:Membranes, Artificial; D011083:Polycyclic Compounds / Q000032:analysis*
chemical_list: D000577:Amides; D007202:Indicators and Reagents; D007476:Ionophores; D008567:Membranes, Artificial; D011083:Polycyclic Compounds; D003035:Cobalt