title: Fabrication of a PVC membrane samarium(III) sensor based on N,N',N"-tris(4-pyridyl)trimesic amide as a selectophore.
abstract: A new ion-selective electrode for Sm(3+) ion is described based on the incorporation of N,N',N"-tris(4-pyridyl)trimesic amide (TPTA) in a poly(vinylchloride) (PVC) matrix. The membrane sensor comprises nitrobenzene (NB) as a plasticizer, and oleic acid (OA) as an anionic additive. The sensor with the optimized composition shows a Nernstian potential response of 19.8 ± 0.5 mV decade(-1) over a wide concentration range of 1.0 × 10(-2) and 1 × 10(-6)mol L(-1), with a lower detection limit of 4.7 × 10(-7)mol L(-1) and satisfactor applicable pH range of 3.6-9.2. Having a short response time of less than 10s and a very good selectivity towards the Sm(3+) over a wide variety of interfering cations (e.g. alkali, alkaline earth, transition and heavy metal ions) the sensor seemed to be a promising analytical tool for determination of the Sm(3+). Hence, it was used as an indicator electrode in the potentiometric titration of samarium ion with EDTA. It was also applied to the direct samarium recovery in binary mixtures.
authors.affiliation: Department of Applied Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran. Electronic address: haszamani@yahoo.com.
authors.forename: Hassan Ali
authors.initials: HA
authors.lastname: Zamani
authors.affiliation: Resident of General Surgery, Endoscopic and Minimaly Invasive Surgery Research Center, Ghaem Hospital, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Fatemeh
authors.initials: F
authors.lastname: Naghavi-Reyabbi
authors.affiliation: Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran.
authors.forename: Farnoush
authors.initials: F
authors.lastname: Faridbod
authors.affiliation: Department of Chemistry, Faculty of Basic Sciences, Shahrood Branch, Islamic Azad University, Shahrood, Iran.
authors.forename: Majid
authors.initials: M
authors.lastname: Mohammadhosseini
authors.affiliation: Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran.
authors.forename: Mohammad Reza
authors.initials: MR
authors.lastname: Ganjali
authors.affiliation: Department of Chemistry, Iran University of Science and Technology, Tehran, Iran.
authors.forename: Azadeh
authors.initials: A
authors.lastname: Tadjarodi
authors.affiliation: Department of Chemistry, Iran University of Science and Technology, Tehran, Iran.
authors.forename: Maryam
authors.initials: M
authors.lastname: Rad
mesh_terms: D002138:Calibration; D006863:Hydrogen-Ion Concentration; D017736:Ion-Selective Electrodes; D057230:Limit of Detection; D008567:Membranes, Artificial; D011143:Polyvinyl Chloride / Q000737:chemistry*; D011199:Potentiometry / Q000295:instrumentation*; D012493:Samarium / Q000032:analysis* / Q000737:chemistry
chemical_list: D008567:Membranes, Artificial; D012493:Samarium; D011143:Polyvinyl Chloride