Amperometric determination of nitrite by oxidation at a glassy carbon electrode

Abstract

Nitrite ion has been determined amperometrically by oxidation a t a glassy carbon electrode. A flow injection analysis procedure using this detector has been constructed and some interferences assessed. One of the interfering species was found to be ascorbic acid, and the analysis of an extract of a cooked meat was found to give satisfactory results when ion-interaction chromatography, with amperometric detection, was used.

Electrocatalytic Nitrite Determination Using Iron Phthalocyanine Modified Gold Nanoparticles

“…These are mainly based on potentiometric [17], voltammetric [16] and amperometric [18] measurements. Although the nitrite ion is electroactive at carbon electrodes, its oxidation requires a high overvoltage where oxidisable compounds may interfere [19], hence catalytic modification of the electrode surface is required to lower this value. It has been well-documented in the literature that electrodes modified with metallophthalocyanine and metalloporphyrin complexes can be used as electrocatalysts [20,21].…”

A Novel Nitrite Amperometric Sensor and Its Application in Food Analysis

“…However, the electrochemical behavior of nitrite is poor at the conventional solid electrode surfaces (platinum, glassy carbon and gold) because several species may poison the electrode surface and decrease the electrode sensitivity and accuracy [16]. Among these electrodes, the glassy carbon (GC) electrode is widely used [18,19] and oxidative amperometry has been reported to detect nitrite at the bare GC electrode [20,21]. Since the nitrite oxidation involves a large overpotential at the surface of a bare GC electrode, the usefulness of this approach is limited.…”

Electrochemical properties of benzylmercapto and dodecylmercapto tetra substituted nickel phthalocyanine complexes: Electrocatalytic oxidation of nitrite

“…Various methods have been used to determine nitrite ions, including: spectrophotometry [5], chromatography [6], and electrochemical methods [7][8][9][10][11][12]. The later have more advantages over the other methods in terms of cost and time.…”