title: [Quality control of testosterone and digoxin radioimmunoassays and cortisol competitive protein binding assay by the reference sample method].
abstract: The inclusion of a minimum of 2 reference samples in the radioimmunoassay of testesterone and digoxin, and the competitive protein binding assay of cortisol served as a simple and practical index of overall assay performance. Statistical parameters, the mean plus or minus 2 standard deviation limits as well as the % coefficient of variation were determined at 3 clinically significant values for these samples. While a 50% intercept served mainly to indicate standard curve sensitivity, quality control sera provided a valid assessment of annay precision.
mesh_terms: D001667:Binding, Competitive; D003201:Computers; D004077:Digoxin / Q000097:blood*; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D006854:Hydrocortisone / Q000097:blood*; D008297:Male; D008722:Methods; D011485:Protein Binding; D011786:Quality Control; D011863:Radioimmunoassay / Q000592:standards; D011869:Radioligand Assay / Q000592:standards; D013739:Testosterone / Q000097:blood*
chemical_list: D013739:Testosterone; D004077:Digoxin; D006854:Hydrocortisone