Nitrate Ion Selective Electrode Based on Ion Imprinted Poly(N-methylpyrrole)
| Autor: | George M. Murray, Ellen M. Bomar, George S. Owens |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Working electrode
Standard hydrogen electrode 010401 analytical chemistry Potentiometric titration Inorganic chemistry Absolute electrode potential Potassium nitrate ion selective electrode conductive polymer N-methylpyrrole 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Reference electrode 0104 chemical sciences Analytical Chemistry Ion selective electrode lcsh:Biochemistry chemistry.chemical_compound Quinhydrone electrode chemistry lcsh:QD415-436 Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | Chemosensors; Volume 5; Issue 1; Pages: 2 Chemosensors, Vol 5, Iss 1, p 2 (2017) |
| ISSN: | 2227-9040 |
| DOI: | 10.3390/chemosensors5010002 |
| Popis: | A poly(N-methylpyrrole) based ion selective electrode (ISE) has been prepared by electro-polymerization of N-methylpyrrole using potassium nitrate as the supporting electrolyte. Electrochemical and chemical variables were used to optimize the potentiometric response of the electrodes and to maximize the selectivity for nitrate over potential interferences. The selectivity, longevity and stability of the ion-imprinted polymer give this electrode advantages over traditional nitrate ISEs. The best prototype electrode exhibits a linear potential response to nitrate ion within the concentration range of 5.0 × 10−6 to 0.1 M nitrate with a near Nernstian slope of −56.3 mV per decade (R2 = 0.9998) and a strong preference for the nitrate ion over other anions. The selectivity coefficients of the electrode were evaluated by the fixed interference method. The use of N-methylpyrrole has advantages over pyrrole in terms of selectivity and pH insensitivity. |
| Databáze: | OpenAIRE |
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