Abstract
The construction, performance characteristics and application of a novel copper (II) membrane sensor based on a new Dimethyl 4, 4′-(o-phenylene)bis(3-thioallophanate) are reported in this paper. The designed sensor exhibited a wide linear response with a slope of 30.3mV per decade over the concentration range of 9.8×10−6–1.0×10−1M. The potentiometric response is independent on the pH of the solution in the range of 3.1–7.6. The electrode shows a response time of 20s. The proposed electrode can be used for at least two months without any considerable divergence in potentials. It exhibits very good selectivity relative to a wide variety of alkali, alkaline earth, transition and heavy metal ions. The developed sensor was used for the quantitative determination of Cu (II) ions both in synthetic and real samples. The electrode assembly was also used as an indicator electrode in the potentiometric titration of Cu2+ with EDTA.
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► A new membrane material has been used for copper ISE. ► Sensor shows Nernstian slope, wide linear response and working pH range. ► Sensor shows short response time, long lifetime. ► Highly selective over alkali, alkaline earth, and transition metal ions ► Can be used for quantitative determination of Cu(II) in synthetic, real samples