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Controlling the selectivity of glassy carbon flow detectors using covalently attached monolayers
Author(s) -
Downard Alison J.,
Roddick Alisa D.
Publication year - 1997
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.1140090908
Subject(s) - selectivity , monolayer , amperometry , aqueous solution , glassy carbon , alkyl , chemistry , covalent bond , electrode , carbon fibers , chemical engineering , inorganic chemistry , materials science , organic chemistry , electrochemistry , cyclic voltammetry , catalysis , biochemistry , composite material , composite number , engineering
Significant improvements in selectivity for amperometric detection in flow analysis are achieved at covalently modified glassy carbon electrodes. Flow detectors modified with p ‐alkylbenzene (alkyl = methyl, decyl) and p ‐phenylacetate monolayers demonstrate how selectivity may be obtained on the basis of solute hydrophobicity and charge. The modified electrodes are stable under hydrodynamic conditions and in aqueous and mixed aqueous/organic carrier streams.