A Potentiometric Sensor for Cd2+ Based on Carbon Nanotube Paste Electrode Constructed from Room Temperature Ionic Liquid,Ionophore and Silica Nanoparticles |
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| Authors: | Abbas Afkhami Hasan Bagheri Ali Shirzadmehr Hosein Khoshsafar Pegah Hashemi |
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| Institution: | 1. Faculty of Chemistry, Bu‐Ali Sina University, Hamedan, Iran;2. Department of Chemistry, Takestan Branch, Islamic Azad University, Takestan, Iran |
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| Abstract: | A novel and effective potentiometric sensor for the rapid determination of Cd2+ based on carbon paste electrode consisting of the room temperature ionic liquid 1‐butyl‐3‐methylimidazolium hexafluorophosphate, multiwalled carbon nanotubes, silica nanoparticles and ionophore was constructed. The prepared composite has a low potential drift, high selectivity and fast response time, which leads to a more stable potential signal. A linear dynamic range of 4.50×10?9–1.00×10?1 mol L?1 with a detection limit of 2.00×10?9 mol L?1 was obtained. The modified electrode was successfully applied to the accurate determination of trace amounts of Cd2+ in environmental and biological samples. |
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| Keywords: | Potentiometric sensors Modified carbon paste electrodes Cadmium(II) determination Multiwalled carbon nanotubes Room temperature ionic liquids |
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