Electrocatalytic oxidation and flow detection analysis of semicarbazide at based IrOx chemically modified electrodes

被引：17

作者：

Casella, Innocenzo G. ^{[1
]}

Contursi, Michela ^{[1
]}

机构：

[1] Univ Basilicata, Dipartimento Sci, I-85100 Potenza, Italy

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2015年 / 209卷

关键词：

Iridium oxide; Modified electrode; Amperometry; Semicarbazide; TANDEM MASS-SPECTROMETRY; IRIDIUM OXIDE-FILMS; THIN-FILM; SENSOR; PRODUCTS; FABRICATION; VALIDATION; CARBON; EGG;

D O I：

10.1016/j.snb.2014.11.073

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

An IrOx modified electrode was characterized and proposed as an amperometric sensor for the detection of semicarbazide using cyclic voltammetry, chronoamperometry and amperometry techniques. The modified electrode was characterized as sensing probe in both acid and alkaline medium toward the electrocatalytic oxidation and detection of semicarbazide. A liquid chromatography approach based on the strong cation exchange mode (LC-SCX column) was used in acid conditions for the separation and analysis of semicarbazide in a synthetic mixture. Operating under a constant applied potential of 1.1 V vs. Ag/AgCl and using HClO4 as carrier electrolyte, the limit of detection (LOD) is attested at level of 0.1 mu M (i.e., 7.5 mu g L-1), while an excellent precision and temporal stability of the amperometric signal, was observed. The linear ranges spanning over three order of magnitude of the detection limit with a correlation coefficients higher than 0.995. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：25 / 31

页数：7

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