A Nitrite Electrochemical Sensor Based on Boron-Doped Diamond Planar Electrochemical Microcells Modified with a Monolacunary Silicotungstate Polyoxoanion

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/SiW11) modified (BDD) electrode. It was found that (SiW11) layer was uniformly formed on the electrode surface. It was observed that (BDD/PPD/SiW11) showed excellent electrocatalytic activities towards nitrite ion. Under the selected conditions, the anodic peak maximum at -0.6V was linear versus nitrite concentration in the 40 mu M-4 mM range, and the detection limit obtained was 20 mu M. The newly developed electrode has been successfully applied to the determination of nitrite content in real river water samples.
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Submitted on : Tuesday, August 25, 2015 - 5:20:10 PM
Last modification on : Wednesday, September 12, 2018 - 10:00:05 AM

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Yosra Sahraoui, Amel Sbartai, Sana Chaliaa, Nicole Jaffrezic-Renault, Abderrazak Maaref, et al.. A Nitrite Electrochemical Sensor Based on Boron-Doped Diamond Planar Electrochemical Microcells Modified with a Monolacunary Silicotungstate Polyoxoanion. Electroanalysis, Wiley-VCH Verlag, 2015, 27 (6), pp.1359-1367. ⟨10.1002/elan.201400682⟩. ⟨hal-01186969⟩

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