Studies with an inorganic ion-exchange membrane exhibiting selectivity for Pb(II) ions |
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Authors: | Srivastava S K Kumar S Jain C K Kumar S |
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Institution: | Department of Chemistry, University of Roorkee, Roorkee-247667, India. |
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Abstract: | A solid membrane electrode made with titanium arsenate as membrane material and "Araldite" as binder has been used to measure the activity of lead in the concentration range from 0.1 M to 5 x 10(-6)M. The electrode is unaffected by many cations, nitrate and acetate. The response time is 40-60 sec over the whole concentration range (in a static system) and the electrode has a working life of at least four months. The electrode can work in the pH range 2-5 and is tolerant of ethanol up to a content of 30% v v . It has been successfully used for end-point indication in potentiometric titration of lead. A membrane treated with cationic surfactant exhibits better selectivity. |
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