title: Development of Zn(II) sensors based on the assisted transfer of metal ions by hydrophobic ligands through gel-supported microinterfaces.
abstract: Square-wave voltammetry (SWV) has been used to study the transfer of zinc(II) ion under static conditions, assisted by 5,6-diphenyl-3-(2-pyridyl)-1,2,4-triazine (DPT), through gel-supported microinterfaces. Microhole arrays created by laser photoablation of thin polyester films were used to support an organic gel phase prepared by addition of 1,3:2,4-dibenzylidenesorbitol (DBS) to a solution of o-nitrophenyloctyl ether (o-NPOE) with the appropriate supporting electrolyte. The results show that SWV can be used with the gel-supported microinterfaces if a gelified aqueous reference is used for the organic phase. Under such conditions a preliminary estimate of the detection limit for the determination of Zn2+ is 5 x 10(-8) mol L(-1).
authors.affiliation: Departamento de Química, Faculdade de Ciências, Porto, Portugal. cmpereir@fc.up.pt
authors.forename: C M
authors.initials: CM
authors.lastname: Pereira
authors.forename: N
authors.initials: N
authors.lastname: Tirilly
authors.forename: M C
authors.initials: MC
authors.lastname: Martins
authors.forename: F
authors.initials: F
authors.lastname: Silva
mesh_terms: D004563:Electrochemistry / Q000295:instrumentation / Q000379:methods; D007202:Indicators and Reagents; D019216:Metals, Heavy / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis; D015032:Zinc / Q000032:analysis*
chemical_list: D007202:Indicators and Reagents; D019216:Metals, Heavy; D014874:Water Pollutants, Chemical; D015032:Zinc