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Stripping voltammetry at microdisk composite electrode assembly
Author(s) -
Wang Joseph,
Armalis Saulius
Publication year - 1995
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.1140071009
Subject(s) - stripping (fiber) , electrode , anodic stripping voltammetry , detection limit , materials science , composite number , deposition (geology) , analytical chemistry (journal) , voltammetry , nanotechnology , optoelectronics , composite material , chemistry , electrochemistry , chromatography , paleontology , sediment , biology
The attractive stripping voltammetric performance of the recently developed RAM electrode, consisting of 3.5‐μm radius carbon microdisks embedded in epoxy resin, is described. The microdisk dimensions and interdisk spacings of the RAM surface lead to nonlinear diffusional flux and offer efficient metal deposition from quiescent samples. Coupled with large “collective” stripping currents, a wide potential window and a low background current, the new electrode yields low detection limit (e.g., 0.3 μg/L lead and cadmium for 2‐min deposition) and good precision (2.1–2.3% RSD, n = 15). Assays of drinking water are used for illustration.