| Autor: |
Elsayda A. S. Amerah, Nashwa M. H. Rizk, Salem M. Hamza, Hamdy A.B. Matter, Fathi A. G. Elsaid |
| Jazyk: |
angličtina |
| Předmět: |
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| Zdroj: |
Arabian Journal for Science and Engineering. 38(7):1681-1689 |
| ISSN: |
1319-8025 |
| DOI: |
10.1007/s13369-012-0383-2 |
| Popis: |
PVC-based membranes of sulfamethoxazole diazonium resorcinol (SDR) as electroactive material with dioctylphthalate (DOP), Dioctylsebacate (DOS), o- Nitroph enyloctylether (o-NPOE) as plasticizing solvent mediators have been found to act as Ni2+ selective sensor, the best performance was obtained with the sensor having a membrane of composition plasticizer:PVC:ionophore in the ratio 200:100:5 mg. The sensor exhibits Nernstian response in the activity range 5 × 10−6 to 1.0 × 10−1 M, performs satisfactorily over a wide pH range (5–9), with a fast response time (10 s). The sensor was found to work satisfactorily in partially different internal solution concentrations and could be used over a period of 2 months. Potentiometric selectivity coefficients determined by matched potential method (MPM) indicate excellent selectivity for Ni2+ ions. The sensors could be used successfully in the estimation of nickel as an indicator electrode in potentiometric titration. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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