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Analytical Performance of Clay Paste Electrode and Graphene Paste Electrode-Comparative Study |
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| Authors: | Ewelina Skowron Kaja Spilarewicz-Stanek Dariusz Guziejewski Kamila Koszelska Radovan Metelka Sylwia Smarzewska |
| Affiliation: | 1.Polfarmex S.A., Jozefow 9, 99-300 Kutno, Poland;2.Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland;3.Department of Inorganic and Analytical Chemistry, Faculty of Chemistry, University of Lodz, Tamka 12, 91-403 Lodz, Poland;4.Department of Analytical Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentska 573, 53210 Pardubice, Czech Republic; |
| Abstract: | The analytical performance of the clay paste electrode and graphene paste electrode was compared using square wave voltammetry (SWV) and cyclic voltammetry (CV). The comparison was made on the basis of a paracetamol (PA) determination on both working electrodes. The influence of pH and SWV parameters was investigated. The linear concentration ranges were found to be 6.0 × 10−7–3.0 × 10−5 and 2.0 × 10−6–8.0 × 10−5 mol L−1 for clay paste electrode (ClPE) and graphene paste electrode (GrPE), respectively. The detection and quantification limits were calculated as 1.4 × 10−7 and 4.7 ×10−7 mol L−1 for ClPE and 3.7 × 10−7 and 1.2 × 10−6 mol L−1 for GrPE, respectively. Developed methods were successfully applied to pharmaceutical formulations analyses. Scanning electron microscopy and energy-dispersive X-ray spectroscopy were used to characterize ClPE and GrPE surfaces. Clay composition was examined with wavelength dispersive X-ray (WDXRF). |
| Keywords: | square wave voltammetry paracetamol graphene clay carbon paste electrodes sensors |