Abstract
A new modified carbon paste electrode for determination of Cu2+ made in our laboratory that used a new synthesized macrocycle 7,16-diaza-1-thia-4,10,13,19-tetraoxa-6,17-dioxo-2,3;20,21-dinaphtho-cyclouneicosane as modifier. This sensor exhibits a good affinity toward copper (II) ions over a wide variety of other metal ions. The electrode exhibits a Nernstian slope of 30 (±0.5) mV per decade for copper (II) ions over a wide concentration range (1.0 × 10−8–1.0 × 10−2 mol L−1), with a limit of detection of 7.0 × 10−9 mol L−1 (~0.45 ppb). It has a response time of 30 s and can be used for at least 3 months without any considerable divergence in responses. The potentiometric response of the electrode is independent of the pH of test solution in the pH range 3.5–7.5. Finally, it was successfully used as an indicator electrode for determination of copper (II) in real samples such as Karoun river and tap water.
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Mashhadizadeh, M.H., Khani, H. & Shockravi, A. Used a new aza-thia-macrocycle as a suitable carrier in potentiometric sensor of copper (II). J Incl Phenom Macrocycl Chem 68, 219–227 (2010). https://doi.org/10.1007/s10847-010-9770-z
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DOI: https://doi.org/10.1007/s10847-010-9770-z