Electrocatalytic detection of polysaccharides at picomolar concentrations
Language English Country Great Britain, England Media print-electronic
Document type Evaluation Study, Journal Article, Research Support, Non-U.S. Gov't
PubMed
21072334
DOI
10.1039/c0an00681e
Knihovny.cz E-resources
- MeSH
- 2,2'-Dipyridyl chemistry MeSH
- Biosensing Techniques methods MeSH
- Dextrans analysis MeSH
- Electrochemistry methods MeSH
- Electrodes MeSH
- Mannans analysis MeSH
- Osmium chemistry MeSH
- Polysaccharides analysis MeSH
- Sensitivity and Specificity MeSH
- Publication type
- Journal Article MeSH
- Evaluation Study MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- 2,2'-Dipyridyl MeSH
- Dextrans MeSH
- Mannans MeSH
- Osmium MeSH
- Polysaccharides MeSH
Electroinactive polysaccharides (PS) modified by osmium(VI) complexes with nitrogenous ligands produce redox couples at carbon and mercury electrodes. We show that PS adducts with Os(VI) 2,2'-bipyridine produce at ~-1.2 V (against Ag/AgCl/3 M KCl electrode) an additional peak at mercury and solid amalgam electrodes. This peak is due to the catalytic hydrogen evolution, allowing detection of PS (such as dextran and mannan) at picomolar concentrations.
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