title: Copper(II)-selective membrane electrodes based on some recently synthesized mixed aza-thioether crowns containing a 1,10-phenanthroline sub-unit.
abstract: Three different mixed aza-thioether crowns containing a 1,10-phenanthroline sub-unit were investigated to characterize their abilities as copper(II) ion carriers in PVC-membrane electrodes. The electrode based on L1 exhibited a Nernstian response for Cu(2+) ions over a wide concentration range (2x10(-1) to 1x10(-5) M) with a limit of detection of 8.0x10(-6) M (0.5 p.p.m.). The response time of sensor is 15 s, and the membrane can be used for more than 3 months without observing any deviation. The electrode revealed comparatively good selectivities with respect to many alkali, alkaline earth, transition and heavy metal ions, and could be used in a pH range of 2.5-5.5. It was applied to the direct determination and potentiometric titration of the copper(II) ion.
authors.affiliation: Department of Chemistry, Razi University, Kermanshah, Iran.
authors.forename: M
authors.initials: M
authors.lastname: Shamsipur
authors.forename: M
authors.initials: M
authors.lastname: Javanbakht
authors.forename: M F
authors.initials: MF
authors.lastname: Mousavi
authors.forename: M R
authors.initials: MR
authors.lastname: Ganjali
authors.forename: V
authors.initials: V
authors.lastname: Lippolis
authors.forename: A
authors.initials: A
authors.lastname: Garau
authors.forename: L
authors.initials: L
authors.lastname: Tei