Carbon Nanotube Based Sensor for Simultaneous Determination of Acetaminophen and Ascorbic Acid Exploiting Multiple Response Optimization and Measures in the Presence of Surfactant |
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| Authors: | Eduardo Henrique Duarte Lauro Tatsuo Kubota César Ricardo Teixeira Tarley |
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| Institution: | 1. Universidade Estadual de Londrina (UEL), Departamento de Química, Centro de Ciências Exatas, Rodovia Celso Garcia Cid, PR 445 Km 380, CEP 86050‐482, Londrina‐PR, Brazil tel: +55?43?3371?4366;2. fax: +55?43?3371?4286;3. Instituto Nacional de Ciência e Tecnologia (INCT) de Bioanalítica, Universidade Estadual de Campinas (UNICAMP), Instituto de Química, Departamento de Química Analítica, Cidade Universitária Zeferino Vaz s/n, CEP 13083‐970, Campinas – SP, Brazil |
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| Abstract: | A simple procedure for the simultaneous determination of acetaminophen (AC) and ascorbic acid (AA) by differential pulse voltammetry (DPV) using a carbon nanotube paste electrode exploiting measures in cetylpyridinium bromide (CPB) medium is described. Under the best instrumental parameters of DPV, optimized by means of factorial design, the calibration plots in the range 100.0–700.0 µmol L?1 (r=0.993) and 39.4–146.3 µmol L?1 (r=0.995) with limits of detection of 7.1 and 2.1 µmol L?1, were achieved for AA and AC, respectively. The developed method was successfully applied for the AC and AA determination in pharmaceutical formulations, whose accuracy was attested by comparison with HPLC method. |
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| Keywords: | Carbon nanotube paste electrode Acetaminophen Ascorbic acid Surfactant Multiple response optimization |
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