2008
DOI: 10.1590/s0103-50532008000800013
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A novel disposable electrochemical microcell: construction and characterization

Abstract: Este trabalho apresenta uma técnica alternativa de microfabricação para construção de microcélulas eletroquímicas descartáveis contendo os eletrodos de trabalho, auxiliar e de referência em um único dispositivo. Trata-se de um processo simples no qual a termo-transferência de máscaras de toner sobre superfícies de ouro obtidas a partir de discos compactos graváveis (CD-R) definem o formato dos eletrodos (contornos). Numa etapa seguinte, o formato é manualmente coberto com tinta usando uma caneta de retroprojet… Show more

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Cited by 20 publications
(17 citation statements)
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“…This is in agreement with previous studies. 20 Moreover, the performance of the microfluidic cell was better when the pseudo reference electrode was used (located inside the microchannel), both with respect to sensibility and reversibility of the redox couple (ferro/ferricyanide). For cyclic voltammograms conducted in the stationary mode ( Figure 3A), the total current measured changed from 5.83 to 8.75 µA, when the conventional reference electrode was substituted by the silver composite pseudo-reference electrode.…”
Section: Resultsmentioning
confidence: 99%
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“…This is in agreement with previous studies. 20 Moreover, the performance of the microfluidic cell was better when the pseudo reference electrode was used (located inside the microchannel), both with respect to sensibility and reversibility of the redox couple (ferro/ferricyanide). For cyclic voltammograms conducted in the stationary mode ( Figure 3A), the total current measured changed from 5.83 to 8.75 µA, when the conventional reference electrode was substituted by the silver composite pseudo-reference electrode.…”
Section: Resultsmentioning
confidence: 99%
“…The option for these ions as model analytes is supported by the potentiality of the gold working electrode used in the microcell to analyze these metals, as described in the literature. 24,25 Figure 4 presents the signals obtained for the simultaneous analysis of copper and mercury using potentiometric stripping analysis at constant current as function of the increasing concentrations of both metals (10,20,30,40 and 50 µg L -1 ). These chronopotentiograms were recorded using a flow rate of 60 µL min -1 and deposition time of 60 s. A comparison between the performance of the flow-through microcell with a conventional flow-through cell 26 shows a similar sensitivity for both cases, however, the flow rate necessary for the conventional cell to present the same response must be superior to 3.0 mL min -1 .…”
Section: Resultsmentioning
confidence: 99%
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“…Disposable electrochemical micro-cells incorporating working, reference and auxiliary electrodes on a single device were constructed by means of thermaltransfer of toner masks to gold surfaces obtained from recordable CDs. 289 Preparation of the micro-cells was very reproducible, with a relative standard deviation of the electrodes area better than 1.0% (n = 10). In another work, a three electrode electrochemical microfluidic cell was proposed and characterized.…”
Section: Instrumentation and Automationmentioning
confidence: 91%
“…Ferreira et al [58] have utilised a similar approach for the determination dipyrone, along with Pb Cu, Hg, paracetamol and nitrite. Interestingly, their investigation showed the possibility to use a permanent marker pen to define the electrode design on the Au CD-R after defining by laser jet printing.…”
Section: Fabrication Strategiesmentioning
confidence: 99%