title: A stable and sensitive colorimetric method for the determination of ergocalciferol (vitamin D2) by using trifluoroacetic acid.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D003124:Colorimetry; D004872:Ergocalciferols / Q000032:analysis*; D005463:Fluoroacetates; D008722:Methods
chemical_list: D004872:Ergocalciferols; D005463:Fluoroacetates