title: Extraction of Kober chromogen into tetrachloroethane containing trichloroacetic acid in determination of urinary estrogens during pregnancy.
mesh_terms: D003124:Colorimetry / Q000379:methods; D004967:Estrogens / Q000652:urine*; D005260:Female; D006801:Humans; D007202:Indicators and Reagents; D011247:Pregnancy
chemical_list: D004967:Estrogens; D007202:Indicators and Reagents