Abstract
A new PVC membrane electrode for lead ions, based on bis[(1-hydroxy-9,10-anthraquinone)-2-methyl]sulfide as membrane carrier, was prepared. The sensor exhibits a Nernstian response for Pb2+ over a wide concentration range (5.6 × 10−3-4.0 × 10−6 M). It has a response time of about 30 s and can be used for at least 3 months without any divergence in potentials. The proposed membrane sensor revealed good selectivities for Pb2+ over a wide variety of other metal ions. It was used as an indicator electrode in potentiometric titration of lead ion.
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