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Europium and samarium as labels in time-resolved immunofluorometric assay of follitropin.

Authors :
Bador R
Déchaud H
Claustrat F
Desuzinges C
Source :
Clinical chemistry [Clin Chem] 1987 Jan; Vol. 33 (1), pp. 48-51.
Publication Year :
1987

Abstract

This time-resolved immunofluorometric assay for human follitropin involves use of europium- or samarium-labeled monoclonal antibodies, with an average incorporation ratio of 3 mol of Eu3+ or Sm3+ per mole of antibody. These lanthanide ions are bound to the antibody molecules by means of the anhydride of diethylenetriaminepentaacetic acid. The solid-phase antibody is immobilized inside polystyrene tubes in which plasma samples were assayed in a one-step procedure. After incubation, the fluorescence intensity of Eu3+ or Sm3+ label is measured by time-resolved fluorometry, with a nitrogen laser as the pulsed excitation source. The sensitivity of the assay is largely better with Eu3+ than with Sm3+ because of the difference in their intrinsic luminescence properties. Results obtained with the proposed methods correlated well with those by an immunoradiometric method.

Details

Language :
English
ISSN :
0009-9147
Volume :
33
Issue :
1
Database :
MEDLINE
Journal :
Clinical chemistry
Publication Type :
Academic Journal
Accession number :
3100098