Rapid, quantitative and sensitive immunochromatographic assay based on stripping voltammetric detection of a metal ion label.
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 (Bi(3+)) have been coupled with the antibody through the bifunctional chelating agent diethylenetriamine pentaacetic acid (DTPA). After immunoreactions, Bi(3+) 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.
Lu
Fang
F
InTec Science, Inc., Brisbane, California 94005, USA.
Wang
Kai Hua
KH
Lin
Yuehe
Y
D015374:Biosensing Techniques; D002845:Chromatography / Q000379:methods*; D007120:Immunochemistry / Q000379:methods*; D008670:Metals / Q000032:analysis*
D008670:Metals