Abstract
The purpose of the present work is to characterize the cathodic electrochemiluminescence of luminol with a view to its application in continuous immunoassay. The authors designed a method for continuous antibody determination from the change in electrochemiluminescent intensity of luminol resulted from antigen-antibody reactions. The cathodic electrochemiluminescences of luminol-labeled antigens in hydrogen peroxide solution were enhanced by the presence of the respective antibodies. Cathodic electrochemiluminescence of a luminol-labeled antibody was also enhanced by the presence of antigen. The enhancement of electrochemiluminescence may be useful in homogeneous immunoassay of antibodies or antigens. Analysis of a batchwise reaction suggested that the presence of antibody increases the quantum yield of electrochemiluminescence of luminol-labeled antigen. And analysis of the electrolytic current of luminol and hydrogen peroxide at indium-tin oxide (ITO) cathode revealed that hydrogen peroxide was electrochemically active at the cathode, while luminol was inert. These results suggest that cathodic electrochemiluminescence of luminol or luminol-labeled proteins is triggered by hydroxide radical produced from hydrogen peroxide at the ITO cathode.
| Original language | English |
|---|---|
| Pages (from-to) | 851-857 |
| Number of pages | 7 |
| Journal | Journal of Chemical Engineering of Japan |
| Volume | 29 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 1996 Oct |
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Keywords
- Antibody
- Antigen
- Biochemical Engineering
- Electrochemiluminescence
- Luminol
ASJC Scopus subject areas
- Chemistry(all)
- Chemical Engineering(all)