AI Article Synopsis
- A novel electrochemical sensor using a poly(alizarin red S)-multi-wall carbon nanotubes composite is developed for detecting nitrite at low concentrations.
- Various electrochemical techniques, including cyclic voltammetry, were employed to analyze the sensor's performance and the nitrite oxidation mechanism.
- The sensor demonstrated a linear response to nitrite concentrations from 30 nM to 1.1 mM and successfully applied to nitrite detection in sausage with promising recovery results.
Article 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.
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| http://dx.doi.org/10.1166/jnn.2010.2534 | DOI Listing |
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