Determination of vitamin D in butter and ghee by chick bioassay.
D000818:Animals; D001681:Biological Assay; D002079:Butter / Q000032:analysis*; D002645:Chickens / Q000254:growth & development*; D002762:Cholecalciferol / Q000032:analysis*; D003611:Dairy Products / Q000032:analysis; D004355:Drug Stability
D002762:Cholecalciferol; D002079:Butter