期刊
TALANTA
卷 74, 期 5, 页码 1635-1641出版社
ELSEVIER
DOI: 10.1016/j.talanta.2007.10.017
关键词
copper; fluorine; voltammetry; vascular tract; mutti-walled carbon nanotubes (MWCNTs); chemically modified electrodes (CMEs)
The voltammetric assay of Cu(II) was investigated using a carbon nanotube electrode (CNE) and fluorine immobilized onto a carbon nanotube electrode (FCNE) in cyclic voltammetry (CV), square-wave (SW) stripping voltammetry, and chronoamperometry. Optimum SW conditions were attained at working ranges of 0.01-0.11 ng L-1 Cu(II) (11 points), and a relative standard deviation of 1.68% (RSD, n = 15) was observed at 10.0 mu g L-1 Cu(II). Within a 200 s accumulation time, detection limit of 0.006 mu g L-1 was attained. The life span of each electrode was more than I month. The sensor was applied to tap water, blood, and rat tail vascular (in vivo). It was found that the sensor could be used with an interface system in the assay of live cells and non-treated blood. (C) 2007 Elsevier B.V. All rights reserved.
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