IMMUNOASSAY FOR FREE THROXINE IN PLASMA, SERUM OR WHOLE BLOOD

摘要

The present invention provides a process for the quantitative determination of free thyroxine (FT4) in plasma, serum or whole blood by immunological methods, wherein the sample is incubated for at most 10 minutes with a 10 to 2000 fold insufficiency of labelled anti-T4 antibodies, referred to the molar amount of total T4 in the sample, then immediately brought together with immobilized excess T4, again incubated, the phases separated and the label measured in one of the phases.