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Journal of Radioanalytical and Nuclear Chemistry

, Volume 266, Issue 2, pp 277–283 | Cite as

Solid phase inclusive immunoradiometric assay for human chorionic gonadotropin using monoclonal antibodies

  • P. C. Vrinda
  • S. N. Paradkar
  • U. H. Nagvekar
  • G. Samuel
  • N. Sivaprasad
Article

Summary

A simple, one step, inclusive immunoradiometric assay for human chorionic gonadotropin (hCG) employing monoclonal antibodies is described. Commercially available monoclonal antibodies from various commercial sources were screened. Identified “detection” antibody was radiolabeled with 125I and the selected “capture” antibody was chemically coupled to magnetizable cellulose to form a solid phase. In the procedure developed, standard/sample, radiolabeled antibody and capture antibody were incubated together for 3 hours at room temperature with shaking. After incubation, the bound complex was quantitated for the associated radioactivity. The analytical sensitivity observed was 1.0 mIU/ml with a wide concentration range up to 1000 mIU/ml of hCG. “High dose hook” of the developed assay was observed beyond 2000 mIU/ml. Results showed that the developed assay had a good precision: intra-assay CV less than 8%, inter-assay CV less than 10% and good analytical recovery of 97-109%. The clinical samples analyzed by the developed procedure showed a good correlation with that of the commercial kit (r = 0.92; y = 0.99x+0.51).

Keywords

Cellulose Physical Chemistry Monoclonal Antibody Inorganic Chemistry Analytical Sensitivity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag/Akadémiai Kiadó 2005

Authors and Affiliations

  • P. C. Vrinda
    • 1
  • S. N. Paradkar
    • 2
  • U. H. Nagvekar
    • 3
  • G. Samuel
    • 4
  • N. Sivaprasad
    • 5
  1. 1.Board of Radiation and Isotope technology (BRIT)
  2. 2.Board of Radiation and Isotope technology (BRIT)
  3. 3.Board of Radiation and Isotope technology (BRIT)
  4. 4.Board of Radiation and Isotope technology (BRIT)
  5. 5.Board of Radiation and Isotope technology (BRIT)

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