A high performance liquid chromatographio (HPLC) method using fluorimeter as a detector with the excitation wavelength at 362 nm and the emission wavelength at 511 nm, was established for determining women's urinary estriol (E3), estradiol (E2) and estrone (E1) as their dansyl derivatives. This method comprises the following procedures: taking 1/1000 of 24-hour urine specimen, acid hydrolysis of the conjugates of estrogens, extraction of free estrogens with ether and alkline solution, preparation of dansyl ...