期刊
TALANTA
卷 74, 期 2, 页码 229-234出版社
ELSEVIER
DOI: 10.1016/j.talanta.2007.05.056
关键词
gold nanoelectrode ensembles; L-dopa; flow injection analysis; voltammetry
This work describes the application of a three-dimensional gold nanoelectrode ensembles (GNEE) for monitoring L-dopa in standards and human urine samples using flow injection analysis (FIA) with amperometric detection. Analytical results reveal that the GNEE exhibited better electrocatalytic activity than a gold disk or glassy carbon electrode. Under optimal conditions Of L-dopa analysis at GNEE, the calibration plot has a linear range of 5-300 ng/mL with a coefficient of variation (CV) of 3.1% in pH 7.0 phosphate buffer saline (PBS, pH 7.0). The detection limit was 3.0 ng/mL for FIA. The high precision and sensitivity of GNEE provides a feasible means of directly determining L-dopa in urine samples. (c) 2007 Elsevier B.V. All rights reserved.
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