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Clinical Chemistry 34: 2337-2340, 1988;
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Clinical Chemistry, Vol 34, 2337-2340, Copyright © 1988 by American Association for Clinical Chemistry

Time-resolved pulsed fluorescence immunometric assays of carcinoembryonic antigen

S Dakubu, R Hale, A Lu, J Quick, D Solas and J Weinberg
Baxter Healthcare Corp., Cambridge, MA 02139.

A time-resolved pulsed fluorescence immunometric assay (TR-PFIA) for carcinoembryonic antigen is described in which either Eu(III) or Tb(III) chelate is used as label. Described in detail is the assay involving the well-documented format of microtiter matrix and Eu(III) fluorescence enhanced with a beta-diketone and quantified in a commercial time-resolving fluorometer. We have also used the same basic assay, but one with a Tb(III) chelate as label, and we read the fluorescence signal directly off a surface without the application of enhancement solution. The Tb(III) fluorescence is then brought into solution by using an analog of dipicolinic acid in an enhancement solution. The latter approach demonstrates the scope of the methodology, which invokes the extra complexity of enhancement only when increased sensitivity might be required. The power and versatility of the enhancement methodology are demonstrated.


The following articles in journals at HighWire Press have cited this article:


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T. Soukka, J. Paukkunen, H. Harma, S. Lonnberg, H. Lindroos, and T. Lovgren
Supersensitive Time-resolved Immunofluorometric Assay of Free Prostate-specific Antigen with Nanoparticle Label Technology
Clin. Chem., July 1, 2001; 47(7): 1269 - 1278.
[Abstract] [Full Text] [PDF]


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Copyright © 1988 by the American Association for Clinical Chemistry.