Lead-selective membrane potentiometric sensor based on an 18-membered thiacrown derivative. |
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| Authors: | M Shamsipur M R Ganjali A Rouhollahi |
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| Institution: | Department of Chemistry, Razi University, Kermanshah, Iran. |
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| Abstract: | A PVC-based membrane electrode for lead ions based on hexathia-18-crown-6-tetraone as membrane carrier was prepared. The influence of membrane composition, pH of test solution and foreign ions on the electrode performance were investigated. The electrode showed a Nernstian response over a lead concentration range from 1.0 x 10(-6) to 8.0 x 10(-3) M at 25 degrees C, and was found to be very selective, precise and usable within the pH range 3.0-6.0. The electrode was successfully used as an indicator electrode in potentiometric titration of lead ions and in direct determination of lead in water samples. |
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