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مقالات فارسیISIکنفرانسهاژورنالها

A Novel Carbon Paste Electrode for Potentiometric Determination of Vanadyl Ion

محل انتشار: Iranian Journal of Chemistry and Chemical Engineering، دوره: 34، شماره: 4
سال انتشار: 1394
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 199

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https://civilica.com/doc/2282789

شناسه ملی سند علمی:

JR_IJCCE-34-4_009

تاریخ نمایه سازی: 17 خرداد 1404

چکیده مقاله:

Carbon paste electrode was modified by disodium ۲,۴-diamino-۷-methylbenzo[g] pteridine-۵,۱۰-dioxide to fabricate a sensor for potentiometric determination of vanadyl ion (VO۲+) 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 (۶۴.۵%), ionophore (۱۶.۶%), paraffin oil (۱۷.۸%), and sodium tetraphenylborate (NaTPB, ۱.۱%). The electrode exhibited a constant sensitivity of ۳۰.۲۰ ± ۰.۵ mV to VO۲+ ions over a concentration range of ۵ mM to ۱ mM. The detection limit was calculated to be ۵ mM with a response time of less than ۳۵ s. The electrode showed to be highly reproducible over a period of ۳ weeks. This sensor exhibits high selectivity to VO۲+ ions and was successfully employed for potentiometric titration of VO۲+ ions with EDTA.

کلیدواژه ها:

Carbon paste electrode ، Potentiometry ، Vanadyl ion ، ۲ ، ۴-diamino-۷-methylbenzo[g]pteridine- ۵ ، ۱۰-dioxide

نویسندگان

Abolfazl Darroudi

Department of Chemistry, Faculty of Samen Hojaj, Technical and Vocational University, Tehran, I.R. IRAN

Hossein Eshghi

Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, I.R. IRAN

Shima Rezaeian

Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, I.R. IRAN

Mahmoud Chamsaz

Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, I.R. IRAN

Mehdi Bakavoli

Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, I.R. IRAN

Kamahldin Haghbeen

Department of Biochemistry, National Research Institute for Genetic Engineering and Biotechnology, Tehran, I.R. IRAN

Akram Hosseiny

Department of Chemistry, Neyshabour Science and Research Branch, Islamic Azad University, Neyshabur, I.R. IRAN

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