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Title: Poly(4-vinylpyridine)-coated glassy carbon flow detectors

Abstract

The performance of a thin-layer flow detector with a glassy carbon electrode coated with a film of protonated poly(4-vinylpyridine) is described. Substantial improvement in the selectivity of amperometric detection for liquid chromatography and flow injection systems is observed as a result of excluding cationic species from the surface. The detector response was evaluated with respect to flow rate, solute concentration, coating scheme, film-to-film reproducibility, and other variables. Despite the increase in diffusional resistance, low detection limits of ca. 0.04 and 0.10 ng of ascorbic acid and uric acid, respectively, are maintained. Protection from organic surfactants can be coupled to the charge exclusion effect by using a bilayer coating, with a cellulose acetate film atop the poly(4-vinylpyridine) layer. Applicability to urine sample is demonstrated.

Authors:
; ;
Publication Date:
Research Org.:
New Mexico State Univ., Las Cruces
OSTI Identifier:
6881674
Resource Type:
Journal Article
Journal Name:
Anal. Chem.; (United States)
Additional Journal Information:
Journal Volume: 59:5
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; ASCORBIC ACID; AMPEROMETRY; LIQUID COLUMN CHROMATOGRAPHY; CARBON; PERFORMANCE; SURFACE COATING; COATINGS; ELECTRODES; POLYVINYLS; SURFACE PROPERTIES; PYRIDINES; URIC ACID; URINE; QUANTITATIVE CHEMICAL ANALYSIS; DIFFUSION; ELECTROCHEMISTRY; EXPERIMENTAL DATA; FLOW RATE; FLUID FLOW; INJECTION; SOLUTES; TRACE AMOUNTS; AROMATICS; AZAARENES; AZINES; BIOLOGICAL MATERIALS; BIOLOGICAL WASTES; BODY FLUIDS; CHEMICAL ANALYSIS; CHEMISTRY; CHROMATOGRAPHY; DATA; DEPOSITION; ELEMENTS; HETEROCYCLIC COMPOUNDS; INFORMATION; INTAKE; MATERIALS; NONMETALS; NUMERICAL DATA; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; ORGANIC OXYGEN COMPOUNDS; ORGANIC POLYMERS; POLYMERS; PURINES; SEPARATION PROCESSES; TITRATION; VITAMINS; WASTES; XANTHINES; 400102* - Chemical & Spectral Procedures; 400105 - Separation Procedures; 360603 - Materials- Properties; 400400 - Electrochemistry

Citation Formats

Wang, J, Golden, T, and Tuzhi, P. Poly(4-vinylpyridine)-coated glassy carbon flow detectors. United States: N. p., 1987. Web. doi:10.1021/ac00132a013.
Wang, J, Golden, T, & Tuzhi, P. Poly(4-vinylpyridine)-coated glassy carbon flow detectors. United States. https://doi.org/10.1021/ac00132a013
Wang, J, Golden, T, and Tuzhi, P. 1987. "Poly(4-vinylpyridine)-coated glassy carbon flow detectors". United States. https://doi.org/10.1021/ac00132a013.
@article{osti_6881674,
title = {Poly(4-vinylpyridine)-coated glassy carbon flow detectors},
author = {Wang, J and Golden, T and Tuzhi, P},
abstractNote = {The performance of a thin-layer flow detector with a glassy carbon electrode coated with a film of protonated poly(4-vinylpyridine) is described. Substantial improvement in the selectivity of amperometric detection for liquid chromatography and flow injection systems is observed as a result of excluding cationic species from the surface. The detector response was evaluated with respect to flow rate, solute concentration, coating scheme, film-to-film reproducibility, and other variables. Despite the increase in diffusional resistance, low detection limits of ca. 0.04 and 0.10 ng of ascorbic acid and uric acid, respectively, are maintained. Protection from organic surfactants can be coupled to the charge exclusion effect by using a bilayer coating, with a cellulose acetate film atop the poly(4-vinylpyridine) layer. Applicability to urine sample is demonstrated.},
doi = {10.1021/ac00132a013},
url = {https://www.osti.gov/biblio/6881674}, journal = {Anal. Chem.; (United States)},
number = ,
volume = 59:5,
place = {United States},
year = {Sun Mar 01 00:00:00 EST 1987},
month = {Sun Mar 01 00:00:00 EST 1987}
}