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- W962987227 abstract "This paper describes a rapid and highly sensitive method for determination of p-nitrophenol (p-NP) in water samples employing a glassy carbon electrode modified with N-Methylphenazonium methyl sulfate (NMP) adsorbed on graphene. This modified electrode presented very efficient capability toward p-NP reduction, decreasing substantially its oxidation potential to −0.6 V vs Ag/AgCl. Electrochemical impedance spectroscopy and FTIR spectroscopy measurements were also carried out in characterizing of the modification process. It has been found that the electrode modification with NMP and graphene has significantly enhanced the electrode response toward p-NP reduction. Linear response range from 1 nmol L−1 up to 1170 nmol L−1 (or 0.001–1.17 μmol L−1) by differential pulse voltammetry and from 500 nmol L−1 up to 5600 nmol L−1 (or 0.50–5.60 μmol L−1) by amperometry were obtained with sensitivities of 42.42 μA L μmol−1 and 28.84 μA L μmol−1, respectively. The proposed method was effectively applied for the determination of p-NP in samples of natural and treated waters and recovery tests to the analyte presented satisfactory results." @default.
- W962987227 created "2016-06-24" @default.
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- W962987227 date "2015-12-01" @default.
- W962987227 modified "2023-10-03" @default.
- W962987227 title "Highly sensitive p-nitrophenol determination employing a new sensor based on N-Methylphenazonium methyl sulfate and graphene: Analysis in natural and treated waters" @default.
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- W962987227 doi "https://doi.org/10.1016/j.snb.2015.07.014" @default.
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