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| Moraes,M.F.D.; Garcia-Cairasco,N.. |
| Current methods for recording field potentials with tungsten electrodes make it virtually impossible to use the same recording electrode also as a lesioning electrode, for example for histological confirmation of the recorded site, because the lesioning procedure usually wears off the tungsten tip. Therefore, the electrode would have to be replaced after each lesioning procedure, which is a very high cost solution to the problem. We present here a low cost, easy to make, high quality glass pipette-carbon fiber microelectrode that shows resistive, signal/noise and electrochemical coupling advantages over tungsten electrodes. Also, currently used carbon fiber microelectrodes often show problems with electrical continuity, especially regarding electrochemical... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Evoked potentials; Glass pipette-carbon fiber; Microelectrodes; Voltammetry. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997001100010 |
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| Macêdo,Isaac Yves Lopes de; Alecrim,Morgana Fernandes; Oliveira Neto,Jerônimo Raimundo; Torres,Ieda Maria Sapateiro; Thomaz,Douglas Vieira; Gil,Eric de Souza. |
| Piroxicam (PRX) was determined in pharmaceutical capsules with differential pulse voltammetry (DPV) in a three electrode system consisting of a pencil graphite electrode (PGE) as working electrode, a Pt wire and a reference electrode of Ag/AgCl/KCl 3 M. An irreversible oxidation peak was observed in Epa c.a. 0.6 V, which correlates to the oxidation of PRX. The coefficient of linear correlation obtained was 0.9946, with limit of detection of 2.1 µM and limit of quantification of 4.7 µM. PGE assays showed good analytical performance compared to high performance liquid chromatography and spectrophotometry, showing the potential to be further developed and employed in quick and simple analyses. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Electroanalysis; Pencil graphite electrode; Piroxicam; Voltammetry. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100504 |
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