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|Type:||Artigo de periódico|
|Title:||Development of a sensor based on tetracyanoethylenide (LiTCNE)/poly-L-ly sine (FILL) for dopamine determination|
de Oliveira, B
|Abstract:||The catalytic oxidation of doparnine (DA) at a LiTCNE (lithium tetracyanoethylenide) film modified electrode is studied by electrochemical approaches. The immobilization of LiTCNE was performed by a polymer (Poly-L-lysine) to prepare this modified electrode and its application for dopamine (DA) determination is described in detail. The modified electrode showed a high activity for the electrooxidation of doparnine (DA) at E-p = 0.20 V versus SCE. The modified electrode presented a wide linear response range for DA from 0.01 up to 10 mu mol 1(-1) by differential pulse voltammetry (DPV) with a detection limit of 0.5 nmol 1(-1). The repeatability of the proposed sensor evaluated in term of relative standard deviation was 3.2% for n = 10. The sensor was applied for the determination of doparnine in pharmaceutical formulations and the average recovery for these samples was 101.9 (+/- 0.1)%. (c) 2004 Elsevier Ltd. All rights reserved.|
|Editor:||Pergamon-elsevier Science Ltd|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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