The 17 beta Estradiol ELISA kit is a competitive ELISA designed to quantify 17-beta-estradiol (E2) with a sensitivity of 8,68 pg/ml. - High sensitivity – detects 17 beta estradiol (E2) as low as 8,68 pg/ml - Wide dynamic range – quantifies 20 to 2000 pg/ml - Compatible with multiple sample types – works with serum, plasma (citrate, EDTA, heparin), and urine.