A Nitrite Electrochemical Sensor Based on Boron‐Doped Diamond Planar Electrochemical Microcells Modified with a Monolacunary Silicotungstate Polyoxoanion
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2015-03-20 |
| Journal | Electroanalysis |
| Authors | Yosra Sahraoui, Amel Sbartai, Sana Chaliaa, Abderrazak Maaref, Amor Haddad |
| Institutions | Institut des Sciences Analytiques, Centre National de la Recherche Scientifique |
| Citations | 26 |
Abstract
Section titled “Abstract”Abstract A new boron doped diamond microcells (BDD) was modified, for rapid, selective and highly sensitive determination of nitrite, using a coating film of polyoxometalates (POMs), formed by cyclic voltammetry on the molecular p ‐phenylenediamine (PPD) functionalized BDD. The scanning electron microscopy (SEM) technique was used to examine the morphology of (PPD/SiW 11 ) modified (BDD) electrode. It was found that (SiW 11 ) layer was uniformly formed on the electrode surface. It was observed that (BDD/PPD/SiW 11 ) showed excellent electrocatalytic activities towards nitrite ion. Under the selected conditions, the anodic peak maximum at −0.6 V was linear versus nitrite concentration in the 40 µM-4 mM range, and the detection limit obtained was 20 µM. The newly developed electrode has been successfully applied to the determination of nitrite content in real river water samples.