Colorimetric determination of some ethinyl steroids in pharmaceutical preparations.
D003124:Colorimetry / Q000379:methods; D045166:Estradiol Congeners / Q000032:analysis*; D045167:Progesterone Congeners / Q000032:analysis; D013256:Steroids / Q000032:analysis*; D013607:Tablets / Q000032:analysis
D045166:Estradiol Congeners; D045167:Progesterone Congeners; D013256:Steroids; D013607:Tablets