title: Spectrophotometric determination of the K vitamins.
mesh_terms: D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents; D010880:Piperidines; D013053:Spectrophotometry / Q000379:methods; D014812:Vitamin K / Q000032:analysis*
chemical_list: D007202:Indicators and Reagents; D010880:Piperidines; D014812:Vitamin K