Thyroxine (T4) ELISA Kit for detecting T4 in serum, plasma, other biological fluids. Species Reactivity: Universal. Detection Range: 3.70-300ng/ml. Sensitivity: 1.29ng/ml. Format: 96-Well Plate. Assay Type: Competitive Inhibition. Detection Method: Colormetric. Assay Time: 2h. Target Synonyms: 3,5,3',5'-Tetraiodothyronine; L-Thyroxine; Levothyroxine. Restrictions: For Research Use Only. Not for use in diagnostic procedures.