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Clinical Chemistry 19: 1307-1308, 1973;
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Clinical Chemistry, Vol 19, 1307-1308, Copyright © 1973 by the American Association for Clinical Chemistry

Serum Thyroxine: Results Compared for a Commercial Radioimmunoassay and a Commercial Competitive Protein Binding Analysis

Norman P. Kubasik 1, H. E. Sine 1, and Martin H. Murray 1

1 Clinical Laboratories, The Genesee Hospital, 224 Alexander St., Rochester, N. Y. 14607.

Two commercial isotopic methods for measuring serum thyroxine—radioimmunoassay and competitive protein binding analysis—have been compared with regard to recovery of thyroxine added to sera, within-run and run-to-run reproducibility, and results for patients’ sera. For the latter the relationship is expressed by the equation CPBA = 082 RIA + 0.33. The correlation coefficient was 0.92.

Submitted on August 6, 1973






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Copyright © 1973 by the American Association for Clinical Chemistry.