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Determination of Cardiac Troponin I for the Auxiliary Diagnosis of Acute Myocardial Infarction by Anodic Stripping Voltammetry at a Carbon Paste Electrode

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An electrochemical immunoassay for cardiac troponin I (cTnI) combining the concepts of the dual monoclonal antibody "sandwich" principle, the silver enhancement on the nano-gold particle, and the anodic stripping voltammetry is described. Four main steps were carried out to obtain the analytical signal, i.e., electrode preparation, immunoreaction, silver enhancement, and anodic stripping voltammetric detection. A linear relationship between the anodic stripping peak current and concentration of cTnI from 1 to 20 ng/ml and a limit of detection of 0.8 ng/ml were obtained. The established method was tested by determining cTnI in acute myocardial infarction (AMI) samples using enzyme-linked immunoadsorbent assay (ELISA) for comparison analysis, and good results were obtained.
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Keywords: ACUTE MYOCARDIAL INFARCTION; ANODIC STRIPPING VOLTAMMETRY; CARBON PASTE ELECTRODE; CARDIAC TROPONIN I; COLLOIDAL GOLD

Document Type: Research Article

Publication date: 2005-08-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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