Determination of ascorbic acid in commercial tablets using pencil drawn electrochemical paper-based analytical devices

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dc.creatorOliveira, Virgílio Xavier Gonçalves
dc.creatorDias, Anderson Almeida
dc.creatorCarvalho, Leandro Lima
dc.creatorCardoso, Thiago Miguel Garcia
dc.creatorColmati Junior, Flavio
dc.creatorColtro, Wendell Karlos Tomazelli
dc.date.accessioned2023-12-19T12:05:23Z
dc.date.available2023-12-19T12:05:23Z
dc.date.issued2018-01-10
dc.description.abstractThis study describes the use of electrochemical paper-based analytical devices (ePADs) drawn with graphite pencil for the determination of ascorbic acid (AA) in commercial tablets. ePADs were fabricated using vegetal paper and graphite pencil. First, the three-electrode electrochemical cell drawn using a graphical software and toner lines were laser printed on the vegetal paper surface to delimit the electrode areas. Then, the electrode regions were manually painted with graphite pencil. Afterwards, the pseudo-reference electrode was defined with the deposition of silver ink over the graphite surface. Cyclic voltammetry and square wave voltammetry (SWV) experiments were performed to optimize the electroanalytical parameters as well as to quantitatively determine the AA concentration in two commercial tables. ePADs exhibited linear behavior for a concentration range between 0.5 and 3.0 mmol L−1. The achieved limit of detection and sensitivity were 70 μmol L−1 and 0.47 μA/mmol L−1, respectively. The AA concentration levels found by SWV experiments in both CenevitTM and Energil CTM were 2.80 ± 0.02 and 3.10 ± 0.01 mmol L−1, respectively. The accuracy of the proposed devices was investigated through recovery experiments in three concentration levels and it presented values between 95 and 115%.
dc.identifier.citationOLIVEIRA, Virgilio X. G. et al. Determination of ascorbic acid in commercial tablets using pencil drawn electrochemical paper-based analytical devices. Analytical Sciences, Berlin, v. 34, p. 91-95, 2018. DOI: 10.2116/analsci.34.91. Disponível em: https://link.springer.com/article/10.2116/analsci.34.91. Acesso em: 12 dez. 202.
dc.identifier.doi10.2116/analsci.34.91
dc.identifier.issne- 1348-2246
dc.identifier.issn0910-6340
dc.identifier.urihttps://link.springer.com/article/10.2116/analsci.34.91
dc.language.isoeng
dc.publisher.countryAlemanha
dc.publisher.departmentInstituto de Química - IQ (RMG)
dc.rightsAcesso Restrito
dc.subjectCarbon electrodes
dc.subjectFood science
dc.subjectMicrofluidic paper-based analytical devices
dc.subjectVitamin C
dc.titleDetermination of ascorbic acid in commercial tablets using pencil drawn electrochemical paper-based analytical devices
dc.typeArtigo

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