Back to Search
Start Over
Monohydrogen phosphate selective electrode based on a synthetic hydrotalcite
- Source :
- Journal of Electroanalytical Chemistry. 690:25-31
- Publication Year :
- 2013
- Publisher :
- Elsevier BV, 2013.
-
Abstract
- An ion-selective electrode (ISE) for monohydrogen phosphate, based on a dispersion of Mg/Al hydrotalcite-like compound particles into a polymeric membrane of polyvinyl butyral, in the coated-wire configuration, is described. The inorganic ionophore was ad hoc synthesized and characterized. The electrode showed a Nernstian response towards monohydrogen phosphate independently from the pH of the solution in the range 4.5–7.8 with a linearity range from 5.0 × 10 −5 to 2.0 × 10 −2 M and a limit of detection of 3.0 × 10 −5 M. The response time varied from 10 to 25 s. Potentiometric selectivity coefficients for the proposed sensor were evaluated over several mono- and divalent anions, chosen among the most common ones. The results pointed out a reasonably good selectivity for monohydrogen phosphate. A successful application of the developed ISE for phosphate determination in hydroxyapatite samples using direct potentiometry is presented.
- Subjects :
- Detection limit
Hydrotalcite
Ion-selective electrode
General Chemical Engineering
Inorganic chemistry
Potentiometric titration
Ionophore
Phosphate
Analytical Chemistry
Polyvinyl butyral
chemistry.chemical_compound
Coated-wire electrode
chemistry
Electrode
Electrochemistry
Hydrotalcite-like compound
Monohydrogen phosphate determination
Selectivity
Subjects
Details
- ISSN :
- 15726657
- Volume :
- 690
- Database :
- OpenAIRE
- Journal :
- Journal of Electroanalytical Chemistry
- Accession number :
- edsair.doi.dedup.....81740c3853fccbd3a2fb153201ddedd4