A sulfite sensor based on electrocatalytic oxidation at a phenothiazine drop-coated screen-printed carbon electrode

► Phenothiazine was drop-coated on screen printed carbon electrode. ► Combined advantages of rapid, easy-to-prepare and disposable. ► High electrocatalytic activity towards sulfite. ► The developed method can determine sulfite in real samples with satisfactory results. This paper describes an easy-t...

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Bibliographic Details
Published in:Journal of electroanalytical chemistry (Lausanne, Switzerland) Switzerland), 2012-06, Vol.675, p.1-4
Main Authors: Chen, Pei-Yen, Chi, Yi-Ming, Yang, Hsueh-Hui, Shih, Ying
Format: Article
Language:English
Subjects:
carbon
detection limit
Drop-coated
electrodes
flow injection analysis
oxidation
Phenothiazine
Screen-printed carbon electrode
Sulfite
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Summary:► Phenothiazine was drop-coated on screen printed carbon electrode. ► Combined advantages of rapid, easy-to-prepare and disposable. ► High electrocatalytic activity towards sulfite. ► The developed method can determine sulfite in real samples with satisfactory results. This paper describes an easy-to-prepare and disposable sulfite sensor using a phenothiazine drop-coated screen printed carbon electrode (PhSPCE) in couple with flow injection analysis. It was found that the PhSPCE possesses electrocatalytic activity toward the oxidation of sulfite with relatively high sensitivity, selectivity, good stability and reproducibility. The linear working range for the determination of sulfite was 0.6ppm to 200ppm with a detection limit of 0.28ppm. The proposed method was successfully applied to the determination of sulfite in real samples.
ISSN:1572-6657
1873-2569
DOI:10.1016/j.jelechem.2012.04.016