A PVC Membrane Electrode for Zirconium Based on 4-Nitrophenylazo-n-(2-hydroxypropylamine) Salicylidine

Authors : Tayebeh SHAMSPUR, Mahdieh SHEIKHSHOAIE, Mohammad Hossin MASHHADIZADEH, Samira SAEEDNIA

Pages : 609-616

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Publication Date : 2012-07-19

Article Type : Research Paper

Abstract :A potentiometric zirconium sensor based on the use of 4-nitrophenylazo-N-insert ignore into journalissuearticles values(2-hydroxypropylamine);salicylidine insert ignore into journalissuearticles values(NHPS); as an ion carrier in poly insert ignore into journalissuearticles values(vinyl chloride); insert ignore into journalissuearticles values(PVC); matrix, was developed. The best performance was observed for the membrane composition including 26.27% PVC, 65.67% N-POE, 5.43% NaTPB and 2.63% ionophore. The electrode which can be used for at least 1 month without observing any deviation exhibited a Nernstian slope of 29.37 mV per decade and a linear range of 1.0×10-2 to2.0×10-7    mol L-1, with a detection limit of 2.0 × 10 − 8 mol L − 1 , for zirconium ion. Also it showed a fast response time of about 10 s. The proposed membrane sensor revealed good selectivity for zirconium ion over a wide variety of other metal ions and could be used in pH range of 5–9.5. It was successfully used as an indicator electrode in potentiometric titration of zirconium ion.  
Keywords : Ion selective electrode, Zirconium, Potentiometry, Schiff base