Simultaneous Differential Pulse Voltammetric Determination of Ascorbic Acid and Caffeine in Pharmaceutical Formulations Using a Boron-Doped Diamond Electrode
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
20/10/2012
20/10/2012
2010
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Resumo |
A cathodically pretreated boron-doped diamond electrode was used for the simultaneous anodic determination of ascorbic acid (AA) and caffeine (CAF) by differential pulse voltammetry Linear calibration curves (r = 0 999) were obtained from 1 9 x 10(-5) to 2 I x 10(-4) mol L(-1) for AA and from 9 7 x 10(-6) to 1 1 x 10-4 mol L(-1) for CAF. with detection limits of 19 wool L(-1) and 7 0 mu nol L(-1). respectively This method was successfully applied for the determination of AA and CAF in pharmaceutical formulations. with results equal to those obtained using a HPLC reference method FAPESP[2007/05894-9] Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) CNPq Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) CAPES |
Identificador |
ELECTROANALYSIS, v.22, n.15, p.1717-1723, 2010 1040-0397 http://producao.usp.br/handle/BDPI/31876 10.1002/elan.200900612 |
Idioma(s) |
eng |
Publicador |
WILEY-BLACKWELL |
Relação |
Electroanalysis |
Direitos |
restrictedAccess Copyright WILEY-BLACKWELL |
Palavras-Chave | #Ascorbic acid determination #Caffeine determination #Differential pulse voltammetry #Boron-doped diamond electrode #Cathodic pretreatments #PYROLYTIC-GRAPHITE ELECTRODE #GLASSY-CARBON ELECTRODE #ACETYLSALICYLIC-ACID #SPECTROPHOTOMETRIC DETERMINATION #ANODIC VOLTAMMETRY #VITAMIN-C #PARACETAMOL #OXIDATION #DOPAMINE #PRETREATMENT #Chemistry, Analytical #Electrochemistry |
Tipo |
article original article publishedVersion |