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Permselective Behavior of an Electrosynthesized, Nonconducting Thin Film of Poly(2‐naphthol) and Its Application to Enzyme Immobilization
Author(s) -
Ciriello Rosanna,
Cataldi Tommaso R. I.,
Centonze Diego,
Guerrieri Antonio
Publication year - 2000
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/1521-4109(200007)12:11<825::aid-elan825>3.0.co;2-p
Subject(s) - chemistry , electrochemistry , calibration curve , membrane , biosensor , glucose oxidase , thin film , substrate (aquarium) , electrode , polymer , inorganic chemistry , phosphate buffered saline , chemical engineering , detection limit , materials science , chromatography , organic chemistry , nanotechnology , biochemistry , oceanography , engineering , geology
The electrooxidation of 2‐naphthol in phosphate buffer at pH 7 leads to the formation of a nonconducting polymer of poly(2‐naphthol) on a platinum electrode. Such a resulting thin film displays an interesting permselective behavior, which proved useful in minimizing the interference of ascorbate, acetaminophen, cysteine, and urate sample molecules. Electrochemical detection in flowing streams was used to investigate the relevance of permselectivity for sensor development. Nonconducting poly(2‐naphthol) film demonstrated useful also as a novel permselective membrane for glucose oxidase immobilization. The glucose response time, t 0.95 , evaluated in batch addition experiments, was lower than 4 s. The calibration plot was linear up to 15 mM of glucose with a sensitivity of 2.2 nA/mM.