Cadmium determination in phosphate fertiliser using a PAN-Nafion® modified glassy carbon electrode by stripping voltammetry
| Autor: | Sirirat Phaisansuthichol, Saravut Dejmanee, Roongroje Ratana-Ohpas |
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| Rok vydání: | 2012 |
| Předmět: |
Working electrode
Chemistry Health Toxicology and Mutagenesis Potassium hydrogen phthalate Inorganic chemistry Public Health Environmental and Occupational Health Soil Science Glassy carbon Electrochemistry Pollution Analytical Chemistry chemistry.chemical_compound Anodic stripping voltammetry Electrode Environmental Chemistry Cyclic voltammetry Waste Management and Disposal Voltammetry Water Science and Technology |
| Zdroj: | International Journal of Environmental Analytical Chemistry. 92:783-796 |
| ISSN: | 1029-0397 0306-7319 |
| DOI: | 10.1080/03067319.2010.537825 |
| Popis: | A simple method for the determination of trace cadmium (Cd) (II), using a disposable 1-(2-pyridylazo)-2-naphthol [PAN]-Nafion®-coated glassy carbon electrode, has been developed. The modified electrode exhibited a significant improvement on both sensitivity and selectivity for Cd (II) determination, compared with a bare glassy carbon electrode (GCE), a PAN-coated GCE (PAN-GCE), and a Nafion®-coated GCE (Nafion® GCE). Differential pulse anodic stripping voltammetry (DPASV) was performed, in 0.05 M potassium hydrogen phthalate (KHP) buffer medium, after Cd (II) ion accumulation. The Cd(II) ion accumulated on the PAN-Nafion® surface of the glassy carbon working electrode through the formation of a chemical complex at an open circuit. The modified GCE with Cd (II) complex was then transferred to a 0.1 M KI solution and subjected to an electrochemical stripping procedure. Cyclic voltammetry (CV) was employed to confirm the successful stepwise assembly procedure for the modified electrode. The structure of PAN-... |
| Databáze: | OpenAIRE |
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