The application of conducting polymer nanoparticle electrodes to the sensing of ascorbic acid

Ambrosi, A., Morrin, A., Smythe, M. R. and Killard, A. J. (2007) The application of conducting polymer nanoparticle electrodes to the sensing of ascorbic acid. Analytica Chimica Acta , 609 (1). pp. 37-43. ISSN 0003-2670

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Publisher's URL: http://dx.doi.org/10.1016/j.aca.2007.12.017

Abstract

An ascorbic acid sensor was fabricated via the drop-casting of dodecylbenzene sulphonic acid (DBSA)-doped polyaniline nanoparticles onto a screen-printed carbon-paste electrode. The modified electrode was characterised with respect to the numbers of drop cast layers, optimum potential and operating pH. The sensor was found to be optimal at neutral pH and at 0V vs. Ag/AgCl. Under these conditions, the sensor showed good selectivity and sensitivity in that it did not respond to a range of common interferents such as dopamine, acetaminophen, uric acid and citric acid, but was capable of the detection of ascorbic acid at a sensitivity of 0.76�AmM−1 or 10.75�AmM−1 cm−2 across a range from 0.5 to 8mM (r2 = 0.996, n = 6), and a limit of detection of 8.3�M (S/N = 3). The sensor was compared to a range of other conducting polymer-based ascorbate sensors and found to be comparable or superior in terms of analytical performance.

Item Type:Article
Uncontrolled Keywords:polyaniline, conducting polymer, dodecylbenzene sulphonic acid, nanoparticle, ascorbic acid, sensor
Faculty/Department:Faculty of Health and Applied Sciences > Department of Biological, Biomedical and Analytical Sciences
ID Code:17268
Deposited By: E. Heathcote
Deposited On:18 Sep 2012 09:57
Last Modified:22 Feb 2013 11:45

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