Evaluation of a new multi-walled carbon nanotube paste electrode modified with Alizarin Red S for the determination of tellurium by differential pulse stripping voltammetry |
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| Authors: | Shokoofe Jahandari Mohammad Ali Taher Hamid Fazelirad |
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| Institution: | 1. Department of Chemistry, Shahid Bahonar University of Kerman, Kerman, Iranshjahandari@yahoo.com;3. Department of Chemistry, Shahid Bahonar University of Kerman, Kerman, Iran;4. Department of Polymer, Science and Research branch, Islamic Azad University, Yazd, Iran |
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| Abstract: | A new modified carbon paste electrode based on multi-walled carbon nanotube and Alizarin Red S acts as a chelating agent for tellurium(IV) ions, is described. The electrochemical responses were found to be analytically suitable to develop a method for the determination of tellurium at low concentration levels. Under optimised operational conditions, the sensor exhibited linear behaviour in the range of 2.0–300 ng mL?1 (correlation coefficient: 0.9982) with a detection limit of 0.45 ng mL?1. The results indicate that the sensor is sensitive and effective for the determination of tellurium in water samples and certified reference materials. |
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| Keywords: | Alizarin Red S anodic stripping voltammetry carbon nanotube modified carbon paste electrode tellurium(IV) |
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