论文部分内容阅读
The macrocyclic ligand,15-crown-5,was used as an ionophore for fabrication of a polyvinyl chloride(PVC) based membrane sensor for Ag(Ⅰ) cation.For construction of the Ag(Ⅰ) cation selective electrode the best response characteristics were obtained using the composition: 15-crown-5/PVC/o-nitrophenyloctylether(NPOE)/sodium tetraphenyl borate(NaTPB) in the percentage ratio of 5.6/30/60.5/3.9(w/w/w/w).The electrochemical sensor shows a linear dynamic range 1.0 10 7–1.0 10 1mol/L and a Nernstian slope of 58.9 0.5 mV/decade with a detection limit of 8.09 10 8mol/L for Ag(Ⅰ) cation.It has a fast response time of <10 s and can be used for at least 8 weeks without any considerable divergences in its potential response.It was successfully used as an indicator electrode in potentiometric titration of Ag(Ⅰ)cation with I and Cl anions and also for the determination of this metal cation in radiology waste water.
The macrocyclic ligand, 15-crown-5, was used as an ionophore for fabrication of a polyvinyl chloride (PVC) based membrane sensor for Ag (I) cation. For construction of the Ag (I) cation selective electrode the best response characteristics were obtained using the composition: 15-crown-5 / PVC / o-nitrophenyloctylether (NPOE) / sodium tetraphenyl borate (NaTPB) in the percentage ratio of 5.6 / 30 / 60.5 / 3.9 (w / w / w / w) sensor shows a linear dynamic range of 1.0 10 7-1.0 10 1 mol / L and a Nernstian slope of 58.9 0.5 mV / decade with a detection limit of 8.09 10 8 mol / L for Ag (I) 10 s and can be used for at least 8 weeks without any considerable divergences in its potential response. It was successfully used as an indicator electrode in potentiometric titration of Ag (I) cation with I and Cl anions and also for the determination of this metal cation in radiology waste water.