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Type: Artigo de periódico
Title: Separation And Electrochemical Detection Of Paracetamol And 4-aminophenol In A Paper-based Microfluidic Device.
Author: Shiroma, Leandro Yoshio
Santhiago, Murilo
Gobbi, Angelo L
Kubota, Lauro T
Abstract: The present work describes the construction and application of a simple, low cost and sensitive microfluidic paper-based device with electrochemical detection for the detection of paracetamol and 4-aminophenol. The separation channels of a width of 2.0 mm were created on paper using a wax printing process to define the regions of the device. A baseline separation level of the analytes can be obtained in 0.1 mol L(-1) acetate buffer solution at pH 4.5 and by injecting 500 nL of the standard solutions at 12 mm from the working electrode. The electrochemical detection system was created at the end of the channels through a process known as sputtering. The previously separated analytes were detected at the end of the hydrophilic separation channel by applying a potential of 400 mV vs. pseudo Au on the working electrode. Experimental variables such as type of paper (cation exchanger and n1), pH, sample volume, applied potential and distance of sample injection were evaluated and, under the conditions of higher response, it was possible to obtain detection limits of 25.0 and 10.0 μmol L(-1) for paracetamol and 4-aminophenol, respectively.
Subject: Acetaminophen
Capillary Electrochromatography
Electrochemical Techniques
Limit Of Detection
Microfluidic Analytical Techniques
Citation: Analytica Chimica Acta. v. 725, p. 44-50, 2012-May.
Rights: fechado
Identifier DOI: 10.1016/j.aca.2012.03.011
Date Issue: 2012
Appears in Collections:Unicamp - Artigos e Outros Documentos

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