Rapid, quantitative and sensitive immunochromatographic assay based on stripping voltammetric detection of a metal ion label
- 8 September 2005
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in The Analyst
- Vol. 130 (11), 1513-1517
- https://doi.org/10.1039/b507682j
Abstract
A novel, sensitive immunochromatographic electrochemical biosensor (IEB) which combines an immunochromatographic strip technique with an electrochemical detection technique has been demonstrated. The IEB takes advantages of the speed and low-cost of the conventional immunochromatographic test kits and high-sensitivity of stripping voltammetry. Bismuth ions (Bi3+) have been coupled with the antibody through the bifunctional chelating agent diethylenetriamine pentaacetic acid (DTPA). After immunoreactions, Bi3+ was released and quantified by anodic stripping voltammetry at a built-in single-use screen-printed electrode. As an example for the applications of such novel device, the detection of human chorionic gonadotronphin (HCG) in a specimen was performed. This biosensor provides a more user-friendly, rapid, clinically accurate, less expensive immunoassay for such analysis in specimens than currently available test kits.Keywords
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