A Copper(II) Ion‐Selective Potentiometric Sensor Based on <i>N</i>,<i>N</i>′,<i>N</i>″,<i>N</i>′′′‐Tetrakis(2‐pyridylmethyl)‐1,4,8,11‐tetraazacyclotetradecane in PVC Matrix

Abstract

Abstract The simple PVC‐based membrane containing N , N′ , N″ , N ′′′‐tetrakis(2‐pyridylmethyl)‐1,4,8,11‐tetraazacyclotetradecane ( tpmc ) as an ionophore and dibutyl phthalate as a plasticizer, directly coated on a glassy carbon electrode was examined as a new sensor for Cu 2+ ions. The potential response was linear within the concentration range of 1.0×10 −1 –1.0×10 −6 M with a Nernstian slope of 28.8 mV/decade and detection limit of 7.0×10 −7 M. The electrode was used in aqueous solutions over a wide pH range (1.3–6). The sensor exhibited excellent selectivity for Cu 2+ ion over a number of cations and was successfully used in its determination in real samples.