Human triiodothyronine (T3) is a thyroid hormone which circulates bound to various proteins. Only 0.3 % of total serum triiodothyronine is not bound to proteins. This free triiodothyronine (FT3) is responsible for biological activity. Its concentration is independent of the concentration of the binding proteins and thus reflects the true thyroid status.

Name RIA FT3
Ref. IM1579/IM3320
Method RIA
Type Coated tubes
Tests 100/400
Max. Activity (kBq) 225/4x225
Sensitivity 0.5 pM
Incubation conditions 2 hrs/RT;shaking
Calibrator range 0;2-40 pM
Sample volume (μL) 100
Sample form serum; plasma
Analyte info                      
Instructions for Use         
Reagents supplied separately Additional FT3 and FT4 control sample (5x2 mL), Ref. B48021