title: Gas chromatographic determination of the purity of vitamin K3 (menadione).
mesh_terms: D002849:Chromatography, Gas / Q000379:methods; D013058:Mass Spectrometry; D011786:Quality Control; D013055:Spectrophotometry, Infrared; D014812:Vitamin K / Q000032:analysis*
chemical_list: D014812:Vitamin K