Four new modified electrodes are carbon pasted (o-NPOE; electrode I and DOS; electrode II); andscreen-printed electrodes (o-NPOE; electrode III and DOS; electrode IV) based on Cu(II)-metalorganic framework ionophore were constructed for determination of copper ion (Cu(II)) over wideconcentration ranges. The prepared electrodes exhibit Nernstian slope of 28.81 ± 0.31, 29.43 ± 0.74,29.61 ± 0.20 and 30.04 ± 0.22 mV decade-1towards Cu(II) ion over a wide concentration range of10-6- 10-2and 4.9 × 10-7- 1.0 × 10-2 mol L-1 with a detection limit of 1.0 × 10-6and 4.9 × 10-7 molL-1at pH range from 3.0 - 8.0, 3.0 - 8.5, 3.0 - 8.0 and 2.5 - 8.5 for electrodes I, II, III and IV,respectively. Updated electrodes exhibited a stable and repeatable potential throughout 86, 103, 195and 205 days for electrodes I, II, III and IV, respectively. The modified electrodes showed strongselectivity for Cu(II) ion against a large variety of cations. The suggested electrodes wereeffectively used for the identification of Cu(II) ion in various samples of water and the produceddata were well compared to the results obtained using inductively coupled plasma atomic emissionspectrometry (ICP-AAS)..
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