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.

Monohydrogen phosphate selective electrode based on a synthetic hydrotalcite

TONELLI, DOMENICA;GUADAGNINI, LORELLA;
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.
D.Tonelli; S. Ghorbel; M. Colombari; L. Guadagnini; A. Ghorbel
File in questo prodotto:
Eventuali allegati, non sono esposti

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/149690
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 11
  • ???jsp.display-item.citation.isi??? 10
social impact