title: Solid-contact Hg(II)-selective electrode based on a carbon-epoxy composite containing a new dithiophosphate-based ionophore.
abstract: The experimental results herein concern a novel ion-selective electrode manufactured with an inner solid contact based on a new ligand O,O'-(2,2'-biphenylene)dithiophosphate pentyl (PenDTF). This electrode displays high selectivity toward the Hg(II) ion even in the presence of different divalent ions. The electrode also exhibited a good Nernstian response to Hg(II) (33.7±1.0 mV decade(-1)) over an ample concentration range (5.3×10(-7)-1.0×10(-2) mol L(-1)), with a detection limit of (6.1±1.7)×10(-7) mol L(-1). As a result of design, the electrode can be used for many experiments, simply renewing its contact surface with emery paper, without giving rise to a significant response deviation, exhibiting a variation coefficient of 3%, capable of being tested within the 0-5 pH interval. The electrode was used satisfactorily as indicating electrode during the potentiometric titration of Hg(II) ions with EDTA.
authors: Universidad Autónoma Metropolitana-Iztapalapa, Departamento de Química, Área de Química Analítica, San Rafael Atlixco 186, Col. Vicentina, Del. Iztapalapa. C.P. 09340 México DF, México.
authors: J
authors: J
authors: Juarez-Gomez
authors: F
authors: F
authors: Perez-Garcia
authors: M T
authors: MT
authors: Ramirez-Silva
authors: A
authors: A
authors: Rojas-Hernandez
authors: C A
authors: CA
authors: Galan-Vidal
authors: M E
authors: ME
authors: Paez-Hernandez
mesh_terms: D002244:Carbon / Q000737:chemistry; D004785:Environmental Pollutants / Q000032:analysis*; D004853:Epoxy Resins / Q000737:chemistry; D017736:Ion-Selective Electrodes; D007476:Ionophores / Q000737:chemistry*; D008628:Mercury / Q000032:analysis*; D009943:Organophosphorus Compounds / Q000737:chemistry*; D010796:Phthalic Anhydrides / Q000737:chemistry; D011199:Potentiometry
chemical_list: D004785:Environmental Pollutants; D004853:Epoxy Resins; D007476:Ionophores; C586822:O,O'-(2,2'-biphenylene)dithiophosphate pentyl; D009943:Organophosphorus Compounds; D010796:Phthalic Anhydrides; C005752:araldite; D002244:Carbon; D008628:Mercury
keywords: ISE; Ionophore; Mercury (II); Potentiometric titration; Selectivity