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Optimising Adsorptive Stripping Voltammetry: Strategies and Limitations
Author(s) -
Wang Yuanzhe,
Kumar Archana Kaliyaraj Selva,
Compton Richard G.
Publication year - 2021
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.202100679
Subject(s) - adsorptive stripping voltammetry , analyte , voltammetry , electrode , detection limit , anodic stripping voltammetry , adsorption , stripping (fiber) , electroanalytical method , materials science , particle (ecology) , analytical chemistry (journal) , nanotechnology , chromatography , chemistry , electrochemistry , potentiometric titration , organic chemistry , oceanography , composite material , geology
The widely employed electroanalytical technique of adsorptive stripping voltammetry (AdsSV) is critically assessed and evaluated at a wide and diverse range of unmodified and nano‐particle modified carbon electrodes using the analyte fipronil as a paradigmatic case. The generic electroanalytical performances of the nano‐particle modified electrodes are investigated and compared with the unmodified electrodes revealing similar LOD values and pointing to intrinsic limitations of AdsSV arising from the non‐independence of the Faradaic and capacitive signals during the stripping step. Methods for facilitating the adsorption or using different waveforms that may offer a more favourable limit of detection (LOD) at the nano‐particle modified electrodes are suggested and assessed, specifically the use of adsorption onto particles prior to their use for modifying electrodes and also the recently introduced method of semi‐circular voltammetry.