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|Type:||Artigo de periódico|
|Title:||Low Cost, Simple Three Dimensional Electrochemical Paper-based Analytical Device For Determination Of P-nitrophenol|
|Abstract:||We report here the fabrication and electrochemical characterization of a three-dimensional paper-based analytical device made from pencil (hard and soft) and paper as a low-cost, simple, easy-to-use device for p-nitrophenol analysis. The three-dimensional device integrates filtration and was fabricated from conventional printing paper patterned with a wax printer. A quick response code (QR) was added to the device to enable the user to rapidly assess p-nitrophenol information. The counter electrode was drawn on the paper while the working electrode consisted of a short section of graphite obtained from a pencil (30 × 0.3 mm). p-Nitrophenol was selected as the target analyte and basic parameters such as solution pH, buffer concentration, and pulse amplitude were optimized. Under optimized conditions (0.1 M acetate buffer, pH 4.0), a detection limit of 1.1 μM was obtained. The devices showed high sensitivity and a linear range for p-nitrophenol, 10 to 200 μM. The devices were employed to determine p-nitrophenol in water samples and the results showed recoveries ranging from 91.8 to 108.2%. © 2014 Elsevier Ltd.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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