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A New Lead(II)-Selective PVC-Coated Graphite Rod Electrode Based on a Schiff Base Complex

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Abstract

A new lead(II)-selective electrode has been developed based on bis(acetylacetone)-p-phenylenediamine-lead(II) [LPb(NO3)2]H2O complex ionophore as a sensing material, dioctylphthalate (DOP) as a solvent mediator and PVC as a matrix. This electrode exhibits a linear Nernstian response over the concentration range of 1 × 10−5-1 × 10−1 mol l−1 of Pb(II) cation, with a cationic calibration slope of 30.0 ± 0.2 mV/concentration decade and a detection limit of 2 × 10−6 mol l−1 (0.40 ppm). It has a fast response time and can be used for a period of 2 months without any divergence in potentials. The proposed electrode reveals a good selectivity for Pb(II) over a wide variety of other tested cations and could be used in the pH range of 4–8. It was successfully used for direct determination of Pb(II) concentration in some samples. The obtained results show a good agreement with those obtained by an atomic absorption spectrometric method. The average recovery obtained is 96.5 ± 0.5% with standard deviation of 1.2% (n = 8).

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Authors and Affiliations

  1. Hot Lab. Center, Atomic Energy Authority, 13759, Cairo, Egypt

    Hassan A. Arida, Sohair A. El-Reefy & Abeer M. El-Saied

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  1. Hassan A. Arida
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  2. Sohair A. El-Reefy
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  3. Abeer M. El-Saied
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Correspondence to Hassan A. Arida.

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Arida, H.A., El-Reefy, S.A. & El-Saied, A.M. A New Lead(II)-Selective PVC-Coated Graphite Rod Electrode Based on a Schiff Base Complex. ANAL. SCI. 19, 687–690 (2003). https://doi.org/10.2116/analsci.19.687

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  • DOI: https://doi.org/10.2116/analsci.19.687

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