A PVC-based cryptand C2B22 membrane potentiometric sensor for zinc(II) |
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| Authors: | Hamid Reza Pouretedal and M Shamsipur |
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| Institution: | (1) Department of Chemistry, Shiraz University, Shiraz, Iran, IR;(2) Department of Chemistry, Razi University, Kermanshah, Iran, IR |
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| Abstract: | A PVC membrane electrode for zinc ions based on cryptand C2B22 as membrane carrier was prepared. The electrode exhibits a linear stable response over a wide concentration range (5.0
× 10–2– 5.0 × 10–5 mol/L) with a slope of 24 mV/ decade and a limit of detection of 3.98 × 10–5 mol/L (2.6 μg/g). It has a fast response time of about 30 s and can be used for at least 4 months without any divergence
in potential. The proposed sensor revealed good selectivities for Zn2+ over a wide variety of other metal ions and could be used in a pH range of 4–7. It was used as an indicator electrode in
potentiometric titration of zinc ion.
Received: 26 February 1998 / Revised: 25 May 1998 / Accepted: 28 May 1998 |
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