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A Novel Carbon Paste Electrode for Potentiometric Determination of Vanadyl Ion
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نویسنده
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- - ,- - ,- - ,- - ,- - ,- - ,- -
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منبع
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iranian journal of chemistry and chemical engineering - 2015 - دوره : 34 - شماره : 4 - صفحه:89 -96
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چکیده
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Carbon paste electrode was modified by disodium 2,4-diamino-7-methylbenzo[g] pteridine-5,10-dioxide to fabricate a sensor for potentiometric determination of vanadyl ion (vo2+) in aqueous medium. the new ligand was synthesized in three steps with high yield. the optimal composition of the carbon paste was made of graphite powder (64.5%), ionophore (16.6%), paraffin oil (17.8%), and sodium tetraphenylborate (natpb, 1.1%). the electrode exhibited a constant sensitivity of 30.20 ± 0.5 mv to vo2+ ions over a concentration range of 5 mm to 1 mm. the detection limit was calculated to be 5 mm with a response time of less than 35 s. the electrode showed to be highly reproducible over a period of 3 weeks. this sensor exhibits high selectivity to vo2+ ions and was successfully employed for potentiometric titration of vo2+ ions with edta.
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کلیدواژه
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Carbon paste electrode ,Potentiometry ,Vanadyl ion ,4-diamino-7-methylbenzo[g]pteridine- 5 ,10-dioxide
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آدرس
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Department of Chemistry, Faculty of Samen, Department of Chemistry, Faculty of Samen Hojaj, Technical and Vocational University, Tehran, I R IRAN, ایران, Department of Chemistry, Faculty of Sciences,, Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, I R IRAN, ایران, Department of Chemistry, Faculty of Sciences,, Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, I R IRAN, ایران, Department of Chemistry, Faculty of Sciences,, Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, I R IRAN, ایران, Department of Chemistry, Faculty of Sciences,, Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, I R IRAN, ایران, Department of Biochemistry, National Research, Department of Biochemistry, National Research Institute for Genetic Engineering and Biotechnology, Tehran, I R IRAN, ایران, Department of Chemistry, Neyshabour Science, Department of Chemistry, Neyshabour Science and Research Branch, Islamic Azad University, Neyshabur, I R IRAN, ایران
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پست الکترونیکی
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abfmashhad@yahoo.com
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Authors
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