Quantitation of Plasma Testosterone by Improved Competitive Protein-Binding Technique

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Abstract
A method is described for quantitation of testosterone in plasma from females and males. The principal operations of extraction, chromatographic fractionation, and competitive protein-binding assay can be completed for eight duplicate samples in a single day. Experimental data used in the development of the test and the rationale for the specific operations and conditions are presented. The specificity of the method was established by comparing plasma testosterone concentrations determined by the double isotope derivative technique. Concentrations are reported for normal female and male subjects, and for patients with hirsutism, adrenal hyperplasia, Klinefelter’s syndrome, and other endocrine conditions.

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