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Electrochemical sensing of total sulphites in beer using non‐modified screen‐printed carbon electrodes
Author(s) -
Ramos Rui M.,
Brandão Pedro F.,
Gonçalves Luís M.,
Vyskočil Vlastimil,
Rodrigues José A.
Publication year - 2017
Publication title -
journal of the institute of brewing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.523
H-Index - 51
eISSN - 2050-0416
pISSN - 0046-9750
DOI - 10.1002/jib.402
Subject(s) - brewing , electrochemistry , electrode , carbon fibers , detection limit , square wave , glassy carbon , materials science , chemistry , chromatography , cyclic voltammetry , organic chemistry , composite material , physics , voltage , quantum mechanics , fermentation , composite number
An analytical method that combines gas‐diffusion microextraction with square‐wave voltammetric detection using commercial non‐modified screen‐printed carbon electrodes was employed in the determination of total sulphites in beer. The developed methodology showed low limits of detection (0.050 mg L −1 ) and quantification (0.17 mg L −1 ) and an intraday precision of 4.8%. The proposed method was also compared with a reference methodology used in the beer industry (EBC method 9.25.3) showing no significant differences in the obtained results. This is a simple, cheap and notably portable alternative for brewers that wish to quantify sulphites in their products. Copyright © 2017 The Institute of Brewing & Distilling

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