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Fabrication and Application of Poly(alizarin red S)-Carbon Nanotubes Composite Film Based Nitrite Sensor

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Abstract:

In this work, a novel electrochemical nitrite sensor for sensitive determination of nitrite based on poly(alizarin red S)-multi-wall carbon nanotubes (PARS-MWNTs) composite film on the glassy carbon electrode was described. The surface morphologies of different electrodes were characterized by scanning electron microscopy. Cyclic voltammetry, chronocoulometry and linear sweep voltammetry were used to investigate the electrochemical response and oxidation mechanism of nitrite at the PARS-MWNTs composite film based sensor. The experimental parameters were optimized, such as electropolymerization pH value, film thickness and detection pH value et al. Under optimal working conditions, the oxidation peak current of nitrite linearly increased with its concentration in the range of 30 nM to 1.1 mM with a low detection limit of 2 nM. The PARS-MWNTs composite film based nitrite sensor was applied to the determination of nitrite in sausage, and the good recovery indicated that it may have practical applications in nitrite monitoring system.

Keywords: ALIZARIN RED S; ELECTROCHEMICAL SENSOR; MULTI-WALLED CARBON NANOTUBES; NITRITE

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2010.2534

Publication date: October 1, 2010

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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