A new sodium ion selective PVC-coated graphite rod electrode based on 4-amino-benzo-15-crown-5 derivatives of fullerenes
REVIEWS IN ANALYTICAL CHEMISTRY, cilt.26, sa.3, ss.219-228, 2007 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 26 Sayı: 3
- Basım Tarihi: 2007
- Doi Numarası: 10.1515/revac.2007.26.3.219
- Dergi Adı: REVIEWS IN ANALYTICAL CHEMISTRY
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.219-228
- Ankara Üniversitesi Adresli: Evet
Özet
A new sodium ion selective electrode has been developed based on 4-amino-benzo-15-crown-5 derivatives Of C-60 and C-70 fullerenes as the sensing material, dioctylphtalate (DOP) as the plasticizer and PVC as the matrix. This electrode shows a Nernstian response for sodium ions over the concentration range 1x10(-4)-1x10(-1) mol.1(-1) with a slope of 59,4 mV/pNa(+) and a detection limit of 5x10(-5)mol.1(-1). It has fast response time and can function for a period of at least 45 days without any considerable deviation in potentials. The proposed electrode exhibits comparatively good selectivities over a wide variety of other tested cations except potassium and ammonium and can be reliably used in the pH range of 3.5-8.0. The electrodes were tested for direct determination of sodium ion concentrations in some water samples and the results exhibited a good agreement with those obtained by ICP spectrophotometry.