Flow injection amperometric nitrite sensor based on silver microcubics-poly (acrylic acid)/poly (vinyl alcohol) modified screen printed carbon electrode

[Display omitted] This work reports an electrochemical sensor for the nitrite determination by using flow injection amperometry (FI-amp) based on a screen printed carbon electrode (SPCE) modified with silver microcubics-polyacrylic acid/poly vinyl alcohol (AgMCs-PAA/PVA). The AgMCs-PAA was synthesiz...

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Bibliographic Details
Published in:Electrochimica acta 2017-04, Vol.232, p.357-369
Main Authors: Promsuwan, Kiattisak, Thavarungkul, Panote, Kanatharana, Proespichaya, Limbut, Warakorn
Format: Article
Language:English
Subjects:
Acrylic acid
Carbon
Catalysis
Chemical reduction
Chemical synthesis
Electrical measurement
Electrocatalysis
Electrodes
flow injection amperometry
Food
Linear equations
Meat
nitrite
Oxidation
Polyacrylic acid
Reproducibility
screen printed carbon electrode
Sensitivity
Sensors
Silver
silver microcubics-polyacrylic acid/poly vinyl alcohol
Studies
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Summary:[Display omitted] This work reports an electrochemical sensor for the nitrite determination by using flow injection amperometry (FI-amp) based on a screen printed carbon electrode (SPCE) modified with silver microcubics-polyacrylic acid/poly vinyl alcohol (AgMCs-PAA/PVA). The AgMCs-PAA was synthesized via a simple chemical reduction method. The prepared AgMCs-PAA/PVA modified SPCE displayed excellent electrocatalytic properties for the oxidation of nitrite and increased the catalytic current response. Under the optimum conditions, the sensitivity of the AgMCs-PAA/PVA/SPCE was 1.6, 4.9 and 1.2 times higher than the bare SPCE, PVA/SPCE, and Ag/PVA/SPCE, respectively. This sensor exhibited a rapid amperometric response to the oxidation of nitrite, which allowed it to be used for the determination of nitrite with a linear range from 2.0μM to 800.0μM with a limit of detection and a limit of quantification of 4.5 and 14.9μM, respectively. This propose nitrite sensor had a high sensitivity (474.14μAmM-1cm-2), good repeatability (RSD
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2017.02.138