Abstract
The degree of passivation of the working electrode during the amperometric detection in flow can be strongly diminished by the application of pulsed amperometry, even without the application of specific cleaning pulses. Three different potential programs were tested and compared to the traditional amperometry with continuously applied potential. All three programs suppressed the passivation in different degree, although the observed efficiency depends also on the conditions of the determination, particularly the pH of the electrolyte. Simple switching between the detection potential and zero potential provided the best results; more complex potential programs shower either the lower efficiency or the low measurement frequency. The detection and quantification limit, obtained using this method, reached 5.8 × 10−6 mol dm−3 and 1.9 × 10−5 mol dm−3, respectively; their relatively high value is caused by the increase of the background current, inevitably caused by the potential changes.
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References
LaCourse WR, Johnson DC (1993) Anal Chem 65:50
Rocklin RD, Clarke AP, Weitzhandler M (1998) Anal Chem 70:1496
Islam MA, Mahbub P, Nesterenko PN, Paull B, Macka M (2019) Anal Chim Acta 1052:10
LaCourse WR (1997) Pulsed electrochemical detection in high-performance liquid chromatography. Wiley, New York
Stulik K, Pacakova V (1987) Electroanalytical measurements in flowing liquids. Ellis Horwood, Chichester
Hall JR, Schoenfisch MH (2018) Anal Chem 90:5194
Ribeiro GAC, da Rocha CQ, Tanaka AA, da Silva IS (2018) Anal Methods 10:2034
Dejmkova H, Mikes M, Barek J, Zima J (2013) Electroanalysis 25:189
Meshki M, Behpour M, Masoum S (2015) J Electroanal Chem 740:1
Ghoreishi SM, Behpour M, Khoobi A, Moghadam Z (2013) Anal Lett 46:323
Lund H, Hammerich O (2001) Organic electrochemistry. Marcel Dekker, New York, p 550
Acknowledgements
This research was financially supported by the Czech Science Foundation (project No. 20-03187S) and performed within the framework of Specific University Research (SVV260690).
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Dejmkova, H., Giampaglia, D. & Baroch, M. Influence of the pulsed amperometric detection to the passivation of the working electrode. Monatsh Chem 154, 1019–1023 (2023). https://doi.org/10.1007/s00706-023-03089-w
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DOI: https://doi.org/10.1007/s00706-023-03089-w