Electroanalysis of gallic and ellagic acids at a boron-doped diamond electrode coupled with high-performance liquid chromatography
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Date
2020-06-09
Authors
Hayes, Phyllis E.
Glennon, Jeremy D.
Luong, John H. T.
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Publisher
Wiley
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Abstract
Electrochemistry of gallic acid (GA) and ellagic acid (EA) was investigated by cyclic voltammetry (CV) using a bare boron-doped diamond (BDD) electrode. CVs indicate that the electro-oxidation of both GA and EA are quasi-reversible processes. High-performance liquid chromatography (HPLC) coupled with a BDD electrode poised at+1.4 V offers the limit of detection (LOD, S/N=3) of 60 and 200 nM for GA and EA, respectively. The optimized method was then applied to the detection of both acids in Islay, Highland and Scotch whiskeys, with the highest concentrations found in a 14-year-old Highland whiskey.
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Keywords
Boron-doped diamond electrode , Gallic and ellagic acids , High-performance liquid chromatography , Whiskey , Antioxidants , Oxidation
Citation
Hayes, P. E., Glennon, J. D. and Luong, J. H. T. (2020) 'Electroanalysis of Gallic and Ellagic Acids at a Boron-doped Diamond Electrode Coupled with High-performance Liquid Chromatography', Electroanalysis, 32(9), pp. 2027-2035. doi: 10.1002/elan.202060021
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© 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. This is the peer reviewed version of the following article: P. E. Hayes, J. D. Glennon, J. H. T. Luong, ‘Electroanalysis of Gallic and Ellagic Acids at a Boron-doped Diamond Electrode Coupled with High-performance Liquid Chromatography’, Electroanalysis 2020, 32, 2027, which has been published in final form at https://doi.org/10.1002/elan.202060021 This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.