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Anodic stripping voltammetric analysis of selenium: Comparison of electrode geometries
Author(s) -
Hrehocik Michele E.,
Lundgren Jeffrey S.,
Bowyer Walter J.
Publication year - 1993
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140050405
Subject(s) - electrode , microelectrode , anodic stripping voltammetry , stripping (fiber) , detection limit , linear range , materials science , analytical chemistry (journal) , anode , dynamic range , range (aeronautics) , voltammetry , chemistry , electrochemistry , optics , chromatography , physics , composite material
Gold macrodisk, microdisk, and microband electrodes are compared for the anodic stripping voltammetry of Se(IV). All of these electrodes show a stripping peak at 0.79 V with a width at half height of 80–90 mV. The linear dynamic range, limit of detection, sensitivity, and precision are compared when using the three electrodes. Although flux at the microelectrodes is greater than at the macroelectrode, the limit of detection is similar for all three geometries. The linear dynamic range is smallest when using the microdisk electrode. The precision of the peak current is best with the macrodisk electrode. Although microelectrodes enjoy many advantages in analyses based on reversible systems, these advantages are not always realized with irreversible systems.