請用此 Handle URI 來引用此文件: http://hdl.handle.net/11455/34701
標題: Adsorptive potentiometric stripping analysis of dopamine on clay-modified electrode
作者: Zen, J.M.
曾志明
Wang, W.M.
Ilangovan, G.
關鍵字: dopamine
nontronite
Nafion (R)
potentiometric stripping analysis
clay-modified electrode
carbon paste electrodes
ascorbic-acid
microvoltammetric electrodes
electrochemical detection
brain-tissue
invivo
selectivity
charge
期刊/報告no:: Analytica Chimica Acta, Volume 372, Issue 3, Page(s) 315-321.
摘要: The application of adsorptive potentiometric stripping analysis (AdPSA) to the oxidative detection of dopamine (DA) on Nafion(R)-coated nontronite-modified electrode (NCNME) has been demonstrated. Combination of a Nafion(R) coating to discriminate DA from interference with nontronite clay to improve DA accumulation works excellently in DA detection. Anodic pretreatment of the NCNME increases the sensitivity through the positive interaction between the preanodized clay and DA. Variables influencing the AdPSA response are thoroughly explored and optimized. The preconcentration time required in AdPSA is much shorter than in other techniques. Electrocatalysis between the oxidative product of DA and ascorbic acid further increases the AdPSA signal. (C) 1998 Elsevier Science B.V. All rights reserved.
URI: http://hdl.handle.net/11455/34701
ISSN: 0003-2670
文章連結: http://dx.doi.org/10.1016/s0003-2670(98)00375-4
顯示於類別:化學系所

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