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Silver particle-decorated carbon paste electrode based on ionic liquid for improved determination of nitrite
Samo B. Hočevar, Vasko Jovanovski, Eva Menart, 2015

Abstract: A simple silver particle-modified carbon paste electrode is proposed for the determination of low concentration levels of nitrite ions. The electrode consists of a carbon powder decorated with silver sub-micrometre particles (AgPs) and a hydrophobic ionic liquid trihexyltetradecylphosphonium chloride as a binder. It has been shown that AgPs exhibit a strong electrocatalytic effect on the nitrite oxidation. For optimal electroanalytical performance the electrode was conditioned via silver oxidation/reduction cycle. The electrode revealed a linear square-wave voltammetric response in a wide examined concentration range of 0.05 to 1.0 mmol L− 1, limit of detection (LOD) of 3 μmol L− 1 and excellent repeatability with RSD of 0.3%.
Keywords: Silver particles, Square-wave voltammetry, Nitrite, Ionic liquid, Carbon paste electrode
DiRROS - Published: 16.02.2015; Views: 3934; Downloads: 336

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