A Fast Response Strontium Ion‐Selective Electrode Prepared by Sol‐Gel Membrane Technique |
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Authors: | M?A Zanjanchi M Arvand N?O Mahmoodi A Islamnezhad |
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Institution: | Department of Chemistry, Faculty of Science, University of Guilan, P.?O. Box: 1914, Rasht, Iran |
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Abstract: | A sol‐gel electrode, based on 6‐(4‐nitrophenyl)‐2‐phenyl‐4,4‐dipropyl‐3,5‐diaza‐bicyclo 3,1,0] hex‐2‐ene (NPDBH) as a neutral ionophore, was successfully developed for the detection of Sr2+ in aqueous solutions. Theoretical calculations confirmed NPDBH selectivity toward strontium in comparison with some other metal ions. The electrode responds to Sr2+ ion with a sensitivity of 29.1±0.4 mV/decade over the range 8.0×10?7–1.0×10?1 M. Selectivity coefficients determined by matched potential method (MPM) indicate high selectivity for strontium ions. The electrode has a fast response time of 11 s and a working pH range of 3.0–10.0. The sol‐gel electrode shows detection limit of 7.5×10?8 M. |
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Keywords: | Sr2+‐selective electrode Organic – inorganic sol‐gel matrices Neutral carrier Potentiometry Strontium Sol‐gel processes |
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