Cu(II)-all solid state ion selective electrode (ASS-ISE) with a nano-molar detection limit and its use for the analysis of waste water samples

An all-solid-state ion selective electrode (ass-ise) has been developed and used for the selective determination of cu(ii) in the presence of interfering species in complex samples. the device is composed of a conductive graphite-epoxy resin composite coated on a copper wire to act as the ass,which is further coated with a cu(ii) selective pvc membrane,containing 30% pvc,60% 0-nitrophenyloctyl ether (npoe),3% of sodium tetraphenyl borate,and 7% of 2-(1՛-(4՛-(1՛՛-hydroxy-2՛՛-naphthyl)methyleneamino)butyl iminomethyl)-1-naphthol as the selective ion-carrier (l). the behavior of the device revealed that it has a nernstian response of 29.7±0.2 mv/decade over a rather wide concentration range from 1.0×10-8 m to 1.0×10-3 m and the ass-ise could be used down to detection limits as low as 5.5×10-9 m. further evaluations of the electrode proved it to have a good selectivity for cu(ii) as opposed to different commonly occurring interfering ions. the applicability of the ass-ise to the analysis cu(ii) concentration in copper electroplating waste water samples with complex matrices was also evaluated and found to be viable. © 2016,center of excellence in electrochemistry,univ. of tehran. all rights reserved.