title: Assay for vitamins D 2  and D 3  in the presence of tocopherols (vitamin E) and vitamin A.
mesh_terms: D002849:Chromatography, Gas; D004338:Drug Combinations; D014801:Vitamin A / Q000032:analysis*; D014807:Vitamin D / Q000032:analysis*; D014810:Vitamin E / Q000032:analysis*
chemical_list: D004338:Drug Combinations; D014801:Vitamin A; D014807:Vitamin D; D014810:Vitamin E