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All Solid State Graphene Based Potentiometric Sensors forMonitoring of Mercury Ions inWasteWater Samples | ||
International Journal of Environmental Research | ||
مقاله 39، دوره 9، شماره 1، فروردین 2015، صفحه 333-340 اصل مقاله (245.38 K) | ||
نوع مقاله: Original Research Paper | ||
شناسه دیجیتال (DOI): 10.22059/ijer.2015.905 | ||
نویسندگان | ||
M.R. Ganjali* 1؛ F. Faridbod1؛ N. Davarkhah1؛ S.J. Shahtaheri2؛ P. Norouzi1 | ||
1Center of Excellence in Electrochemistry,Faculty of Chemistry,University of Tehran,Tehran, Iran | ||
2Departments of Occupational Health, School of Public Health, and Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran | ||
چکیده | ||
In this work, all-solid-state potentiometric PVC membrane sensor was introduced for fast and simple monitoring of mercury ions in waste water samples. The all solid sate electrode is made based on a conductive composite of graphite, reduced graphene oxide, epoxy resin on a copper wire. A thin layer PVC membrane is then coated on the surface of the new conducting transducer. PVC membrane is composed of 30% PVC, 62% NPOE as plasticizer, 3% ionic liquid, and 5% Hg2+ ion imprinted polymer (IIP). The sensing element of the sensor is an artificial host which is imprinted by vinyl pyridine and a suitable cross-linker. The sensor shows a Nernstian response of 29.4±0.3 mV/decade. Dynamic linear range of the sensor is 1.0×10-8-1.0×10-3 mol/L of the mercury concentration and detection limit of 3.2×10-9 mol/L. The interference of different ionic species with the response of the electrode shows a good selectivity of the proposed sensor. The proposed sensor is successfully applied in determination of mercury ions in some waste water samples. | ||
کلیدواژهها | ||
All solid state؛ mercury؛ Potentiometry؛ sensor | ||
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