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Clinical Chemistry, Vol 29, 168-170, Copyright © 1983 by American Association for Clinical Chemistry
G Samuel, N Sivaprasad, KB Shah and RS Mani
We report a solid-phase radioimmunoassay for human placental lactogen, in which antibody-coated polystyrene tubes and polyurethane sponges are used. Incubation time and temperature, ionic strength of buffer, and nonspecific adsorption have been evaluated for optimum conditions required for routine clinical assays. The validity of the assay technique has been ascertained by its specificity, reproducibility, and recovery. The sensitivity of this method is 0.4 ng of placental lactogen per assay tube.
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